Bump docker/metadata-action from 5.10.0 to 6.0.0

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 5.10.0 to 6.0.0.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](docker/metadata-action@c299e40...030e881)

---
updated-dependencies:
- dependency-name: docker/metadata-action
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build-docker.yml

@@ -21,7 +21,7 @@ jobs:
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051
+        uses: docker/metadata-action@030e881283bb7a6894de51c315a6bfe6a94e05cf
         with:
           images: domna/pyelli