Bump docker/setup-buildx-action from 2.1.0 to 2.9.1

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 2.1.0 to 2.9.1.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@95cb08c...4c0219f)

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

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

.github/workflows/release-50_publish-docker-release.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v3
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@95cb08cb2672c73d4ffd2f422e6d11953d2a9c70 # v2.1.0
+        uses: docker/setup-buildx-action@4c0219f9ac95b02789c1075625400b2acbff50b1 # v2.9.1
       - name: Cache Docker layers
         uses: actions/cache@v3
         with:

.github/workflows/release-51_publish-docker-manual.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v3
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@95cb08cb2672c73d4ffd2f422e6d11953d2a9c70 # v2.1.0
+        uses: docker/setup-buildx-action@4c0219f9ac95b02789c1075625400b2acbff50b1 # v2.9.1
       - name: Cache Docker layers
         uses: actions/cache@v3
         with: