Bump docker/setup-buildx-action from 2.9.0 to 2.9.1

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 2.9.0 to 2.9.1.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@2a1a44a...4c0219f)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/docker-publish.yml

@@ -48,7 +48,7 @@ jobs:
 
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@2a1a44ac4aa01993040736bd95bb470da1a38365
+        uses: docker/setup-buildx-action@4c0219f9ac95b02789c1075625400b2acbff50b1
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action