build(deps): bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/pub-docker.yml

@@ -22,7 +22,7 @@ jobs:
       contents: read
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Log in to Docker Hub
         uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee

.github/workflows/test-docker.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Build Docker image
         uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf