Bump docker/metadata-action from 5.4.0 to 5.5.0 (#72)

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 5.4.0 to 5.5.0.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](docker/metadata-action@v5.4.0...v5.5.0)

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

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.github/workflows/sign-container.yaml

@@ -51,7 +51,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@v5.4.0
+        uses: docker/metadata-action@v5.5.0
         with:
           images: ${{ env.IMAGE_NAME }}
           tags: |