Bump actions/checkout to v4

> Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3.
> For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

Author: Earlopain

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
     outputs:
       strategy: ${{ steps.generate-jobs.outputs.strategy }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: docker-library/bashbrew@HEAD
       - id: generate-jobs
         name: Generate Jobs
@@ -44,7 +44,7 @@ jobs:
     name: ${{ matrix.name }}
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Prepare Environment
         run: ${{ matrix.runs.prepare }}
       - name: Pull Dependencies

.github/workflows/verify-templating.yml

@@ -13,7 +13,7 @@ jobs:
     name: Check For Uncomitted Changes
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Apply Templates
         run: ./apply-templates.sh
       - name: Check Git Status