Bump actions/checkout from 3.6.0 to 4.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.6.0 to 4.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3.6.0...v4.0.0)

---
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/docker-image.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
 
     - name: Checkout
-      uses: actions/checkout@v3.6.0
+      uses: actions/checkout@v4.0.0
 
     - name: Set up Docker Buildx
       uses: docker/[email protected]

.github/workflows/pr.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
 
     - name: Checkout
-      uses: actions/checkout@v3.6.0
+      uses: actions/checkout@v4.0.0
 
     - name: Set up Docker Buildx
       uses: docker/[email protected]