Bump the githubactions-dependencies group with 2 updates

Bumps the githubactions-dependencies group with 2 updates: [docker/metadata-action](https://github.com/docker/metadata-action) and [docker/build-push-action](https://github.com/docker/build-push-action).


Updates `docker/metadata-action` from 5.6.1 to 5.7.0
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](docker/metadata-action@v5.6.1...v5.7.0)

Updates `docker/build-push-action` from 6.13.0 to 6.15.0
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6.13.0...v6.15.0)

---
updated-dependencies:
- dependency-name: docker/metadata-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: githubactions-dependencies
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: githubactions-dependencies
...

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

.github/workflows/publish.yml

@@ -28,12 +28,12 @@ jobs:
                     password: ${{ secrets.GITHUB_TOKEN }}
             -   name: Extract metadata (tags, labels) for Docker
                 id: meta
-                uses: docker/metadata-action@v5.6.1
+                uses: docker/metadata-action@v5.7.0
                 with:
                     images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
             -   name: Build and push Docker image
                 id: push
-                uses: docker/build-push-action@v6.13.0
+                uses: docker/build-push-action@v6.15.0
                 with:
                     context: .
                     push: true