Bump docker/build-push-action from 5 to 6

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5...v6)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/publish-docker-image.yml

@@ -37,7 +37,7 @@ jobs:
  type=raw,value=latest,enable={{is_default_branch}}
 
  - name: Build and push Docker images
- uses: docker/build-push-action@v5
+ uses: docker/build-push-action@v6
  with:
  context: .
  push: true