Bump actions/checkout from 3 to 4

.github/workflows/build_cc.yml

@@ -20,7 +20,7 @@ jobs:
         - variant: clang
           dp_variant: clang
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         submodules: true
     - uses: actions/setup-python@v4

.github/workflows/build_wheel.yml

@@ -38,7 +38,7 @@ jobs:
             platform_id: manylinux_aarch64
             dp_variant: cpu
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
           # https://github.com/pypa/setuptools_scm/issues/480
@@ -60,7 +60,7 @@ jobs:
     name: Build source distribution
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - uses: actions/setup-python@v4
@@ -94,7 +94,7 @@ jobs:
     needs: [build_wheels]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/download-artifact@v3
         with:
           name: artifact

.github/workflows/package_c.yml

@@ -9,7 +9,7 @@ jobs:
     name: Build C library
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Package C library
         run: ./source/install/docker_package_c.sh
       # for download and debug
@@ -30,7 +30,7 @@ jobs:
     needs: [build_c]
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Download artifact
         uses: actions/download-artifact@v3
         with:

.github/workflows/test_cc.yml

@@ -7,7 +7,7 @@ jobs:
     name: Test C++
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.11'