Bump docker/metadata-action from 3.7.0 to 3.8.0 (#523)

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 3.7.0 to 3.8.0.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](https://github.com/docker/metadata-action/compare/v3.7.0...v3.8.0)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/prod-deploy.yml

@@ -44,7 +44,7 @@ jobs:
           password: ${{ secrets.DOCKER_PASSWORD }}
       - name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action@v3.7.0
+        uses: docker/metadata-action@v3.8.0
         with:
           images: ajbura/cinny
       - name: Build and push Docker image