Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
             experimental: true
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: docker-compose -f docker-compose.yml pull --include-deps drupal
       - name: Build the docker-compose stack
         run: docker-compose -f docker-compose.yml build --pull --build-arg BASE_IMAGE_TAG=${{ matrix.drupal_version }} drupal
@@ -40,7 +40,7 @@ jobs:
         module: ['timesup']
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
       - run: docker-compose -f docker-compose.yml pull --include-deps drupal