build(deps): bump docker/metadata-action from 3.6.2 to 3.8.0 (#716)

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 3.6.2 to 3.8.0.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](https://github.com/docker/metadata-action/compare/v3.6.2...v3.8.0)

---
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

@@ -21,7 +21,7 @@ jobs:
       -
         name: Docker meta
         id: docker_meta
-        uses: docker/metadata-action@v3.6.2
+        uses: docker/metadata-action@v3.8.0
         with:
           images: |
             ghcr.io/tus/tusd