Bump docker/metadata-action from 5.4.0 to 5.5.1 (#63)

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 5.4.0 to 5.5.1.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](docker/metadata-action@v5.4.0...v5.5.1)

---
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/release.yaml

@@ -31,7 +31,7 @@ jobs:
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action@v5.4.0
+        uses: docker/metadata-action@v5.5.1
         with:
           images: cmidair/actigraphy