Bump docker/metadata-action from 4.3.0 to 4.4.0

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 4.3.0 to 4.4.0.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](docker/metadata-action@507c2f2...c4ee3ad)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/dockerhub.yml

@@ -31,7 +31,7 @@ jobs:
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action@507c2f2dc502c992ad446e3d7a5dfbe311567a96
+        uses: docker/metadata-action@c4ee3adeed93b1fa6a762f209fb01608c1a22f1e
         with:
           images: adversarialrobustnesstoolbox/releases
           tags: |