Bump docker/metadata-action from 4.6.0 to 5.6.1

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 4.6.0 to 5.6.1.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Upgrade guide](https://github.com/docker/metadata-action/blob/master/UPGRADE.md)
- [Commits](https://github.com/docker/metadata-action/compare/v4.6.0...v5.6.1)

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

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

.github/workflows/docker-publish.yml

@@ -52,7 +52,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@v4.6.0
+        uses: docker/metadata-action@v5.6.1
         with:
           images: |
             ghcr.io/${{ github.repository }}