Bump docker/metadata-action from 4.0.1 to 5.6.1

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 4.0.1 to 5.6.1.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](https://github.com/docker/metadata-action/compare/v4.0.1...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/ci-main.yml

@@ -30,7 +30,7 @@ jobs:
           persist-credentials: false
       - name: Docker meta
         id: docker_action_meta
-        uses: docker/metadata-action@v4.0.1
+        uses: docker/metadata-action@v5.6.1
         with:
           images: |
             name=ghcr.io/${{ github.repository }}/container