chore(deps): bump docker/metadata-action from 4 to 5 (#34)

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 4 to 5.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Upgrade guide](https://github.com/docker/metadata-action/blob/master/UPGRADE.md)
- [Commits](docker/metadata-action@v4...v5)

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

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.github/workflows/release.yml

@@ -57,7 +57,7 @@ jobs:
     - name: Docker meta
       if: ${{ needs.release.outputs.published == 'true' }}
       id: meta
-      uses: docker/metadata-action@v4
+      uses: docker/metadata-action@v5
       with:
         images: ghcr.io/hutchic-org/kong-openssl
         sep-tags: ' '