Bump docker/metadata-action from 4.5.0 to 4.6.0

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 4.5.0 to 4.6.0.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](https://github.com/docker/metadata-action/compare/2c0bd771b40637d97bf205cbccdd294a32112176...818d4b7b91585d195f67373fd9cb0332e31a7175)

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

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

.github/workflows/docker-publish.yml

@@ -48,7 +48,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@2c0bd771b40637d97bf205cbccdd294a32112176
+        uses: docker/metadata-action@818d4b7b91585d195f67373fd9cb0332e31a7175
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}