chore: bump actions/checkout from 5 to 6

.github/workflows/charmcraft-pack.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
 

.github/workflows/db-charm-tests.yaml

@@ -26,14 +26,14 @@ jobs:
             commit: 3405d6943c4e631f7b9388d412b084168e8b84e8  # 2025-11-24T14:29:53Z
     steps:
       - name: Checkout the ${{ matrix.charm-repo }} repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: ${{ matrix.charm-repo }}
           persist-credentials: false
           ref: ${{ matrix.commit }}
 
       - name: Checkout the operator repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           path: myops
           persist-credentials: false

.github/workflows/docs-linkcheck.yaml

@@ -15,7 +15,7 @@ jobs:
     name: Links
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Set up uv

.github/workflows/docs.yaml

@@ -14,7 +14,7 @@ jobs:
     name: Spelling
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Set up uv

.github/workflows/example-charm-tests.yaml

@@ -27,7 +27,7 @@ jobs:
           - examples/k8s-5-observe
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Set up Python 3

.github/workflows/framework-tests.yaml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: astral-sh/setup-uv@85856786d1ce8acfbcc2f13a5f3fbd6b938f9f41  # v7.1.2
@@ -35,7 +35,7 @@ jobs:
         python-version: ["3.10", "3.12", "3.14"]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: astral-sh/setup-uv@85856786d1ce8acfbcc2f13a5f3fbd6b938f9f41  # v7.1.2
@@ -58,7 +58,7 @@ jobs:
         python-version: ["3.10", "3.12", "3.14"]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: astral-sh/setup-uv@85856786d1ce8acfbcc2f13a5f3fbd6b938f9f41  # v7.1.2
@@ -92,7 +92,7 @@ jobs:
         python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: astral-sh/setup-uv@85856786d1ce8acfbcc2f13a5f3fbd6b938f9f41  # v7.1.2

.github/workflows/hello-charm-tests.yaml

@@ -27,7 +27,7 @@ jobs:
           python-version: '3.10'
 
       - name: Checkout the ${{ matrix.charm-repo }} repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: ${{ matrix.charm-repo }}
           persist-credentials: false

.github/workflows/integration.yaml

@@ -33,7 +33,7 @@ jobs:
           --juju-channel=3/stable
           --charmcraft-channel=3.x/stable
           -p "${{ matrix.preset }}"
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: astral-sh/setup-uv@85856786d1ce8acfbcc2f13a5f3fbd6b938f9f41  # v7.1.2
@@ -64,7 +64,7 @@ jobs:
           --juju-channel=${{ matrix.juju-channel }}
           --charmcraft-channel=3.x/stable
           -p microk8s
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: astral-sh/setup-uv@85856786d1ce8acfbcc2f13a5f3fbd6b938f9f41  # v7.1.2

.github/workflows/observability-charm-tests.yaml

@@ -28,7 +28,7 @@ jobs:
             commit: 6c099f751c4cee77430d2588f6001f66d6212d7d  # 2025-10-23T16:04:06Z
     steps:
       - name: Checkout the ${{ matrix.charm-repo }} repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: ${{ matrix.charm-repo }}
           persist-credentials: false

.github/workflows/publish.yaml

@@ -17,7 +17,7 @@ jobs:
       contents: read
     environment: publish-pypi
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: astral-sh/setup-uv@85856786d1ce8acfbcc2f13a5f3fbd6b938f9f41  # v7.1.2

.github/workflows/published-charms-tests.yaml

@@ -131,7 +131,7 @@ jobs:
 # END AUTOGENERATED CONTENT
     steps:
       - name: Checkout the ${{ matrix.charm-repo }} repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: ${{ matrix.charm-repo }}
           persist-credentials: false

.github/workflows/sbom-secscan.yaml

@@ -17,7 +17,7 @@ jobs:
         runs-on: [self-hosted, self-hosted-linux-amd64-jammy-private-endpoint-medium]
         steps:
           - name: Checkout repository
-            uses: actions/checkout@v5
+            uses: actions/checkout@v6
             with:
               persist-credentials: false
           - name: Install dependencies
@@ -26,7 +26,7 @@ jobs:
               sudo apt-get install -y libapt-pkg-dev
               sudo apt install -y python3-apt
           - name: Checkout security scanner
-            uses: actions/checkout@v5
+            uses: actions/checkout@v6
             with:
               repository: canonical/sbomber
               path: scanner

.github/workflows/smoke.yaml

@@ -26,7 +26,7 @@ jobs:
           --charmcraft-channel=3.x/stable
           -p "${{ matrix.preset }}"
       - name: Checkout the repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
 

.github/workflows/test-publish.yaml

@@ -12,7 +12,7 @@ jobs:
     name: Build and publish to Test PYPI
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: astral-sh/setup-uv@85856786d1ce8acfbcc2f13a5f3fbd6b938f9f41  # v7.1.2

.github/workflows/tiobe.yaml

@@ -11,7 +11,7 @@ jobs:
   TICS:
     runs-on: [self-hosted, reactive, amd64, tiobe, noble]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
 

.github/workflows/update-best-practice-doc.yaml

@@ -11,13 +11,13 @@ jobs:
   update-docs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           token: ${{ secrets.UPDATE_DOCS_ACCESS_TOKEN }}
           path: operator
           persist-credentials: true
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           repository: canonical/charmcraft
           path: charmcraft

.github/workflows/update-charm-tests.yaml

@@ -13,7 +13,7 @@ jobs:
   update-pins:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           token: ${{ secrets.UPDATE_CHARM_PINS_ACCESS_TOKEN }}
           persist-credentials: true

.github/workflows/zizmor.yaml

@@ -15,7 +15,7 @@ jobs:
       security-events: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
 

docs/explanation/testing.md

@@ -144,7 +144,7 @@ on:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
       - name: Set up uv
         uses: astral-sh/setup-uv@7
       - name: Set up tox and tox-uv
@@ -164,7 +164,7 @@ Integration tests are a bit more complex, because these tests require a Juju con
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Setup operator environment
         uses: charmed-kubernetes/actions-operator@main
         with:

docs/howto/write-and-structure-charm-code.md

@@ -408,7 +408,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up uv
         uses: astral-sh/setup-uv@7
       - name: Set up tox and tox-uv
@@ -425,7 +425,7 @@ Other `tox` environments can be run similarly; for example unit tests:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up uv
         uses: astral-sh/setup-uv@7
       - name: Set up tox and tox-uv
@@ -451,7 +451,7 @@ a cloud in which to deploy it, is required. This example uses a `concierge` in o
       - name: Install Juju and tools
         run: sudo concierge prepare -p k8s
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up uv
         uses: astral-sh/setup-uv@7
       - name: Set up tox and tox-uv