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](https://github.com/docker/build-push-action/compare/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] <support@github.com>

.github/workflows/cd.yml

@@ -123,7 +123,7 @@ jobs:
       # Publish the container image
       - name: Publish Container Image
         id: publish
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         env:
           LABELS: ${{ steps.meta.outputs.labels }}
           TAGS: ${{ steps.meta.outputs.tags }}