Merge pull request #1813 from Trusted-AI/dependabot/github_actions/docker/metadata-action-4.0.1

Bump docker/metadata-action from 3.3.0 to 4.0.1

Author: beat-buesser

.github/workflows/dockerhub.yml

@@ -31,7 +31,7 @@ jobs:
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        uses: docker/metadata-action@69f6fc9d46f2f8bf0d5491e4aabe0bb8c6a4678a
         with:
           images: adversarialrobustnesstoolbox/releases