Bump actions/checkout from 4.1.7 to 4.2.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.1.7 to 4.2.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4.1.7...v4.2.0)

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

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

.github/workflows/check_docker_build.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4.1.7
+    - uses: actions/checkout@v4.2.0
     - name: Build the Docker image
       env:
         # @see https://docs.docker.com/develop/develop-images/build_enhancements/

.github/workflows/publish_docker_image.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: "ubuntu-20.04"
 
     steps:
-      - uses: actions/checkout@v4.1.7
+      - uses: actions/checkout@v4.2.0
 
       # https://github.com/marketplace/actions/push-to-ghcr
       - name: Build and publish a Docker image for ${{ github.repository }}