Bump docker/setup-buildx-action from 2.8.0 to 2.9.1 (#31)

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 2.8.0 to 2.9.1.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](https://github.com/docker/setup-buildx-action/compare/v2.8.0...v2.9.1)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/docker-publish.yml

@@ -21,7 +21,7 @@ jobs:
         uses: docker/setup-qemu-action@v2
 
       - name: Setup Docker Buildx
-        uses: docker/setup-buildx-action@v2.8.0
+        uses: docker/setup-buildx-action@v2.9.1
 
       - name: Build
         run: docker build -t gameservermanagers/steamcmd:ubuntu-22.04 -f ./Dockerfile.ubuntu-2204 .
@@ -65,7 +65,7 @@ jobs:
         uses: docker/setup-qemu-action@v2
 
       - name: Setup Docker Buildx
-        uses: docker/setup-buildx-action@v2.8.0
+        uses: docker/setup-buildx-action@v2.9.1
 
       - name: Build
         run: docker build -t gameservermanagers/steamcmd:ubuntu-20.04 -f ./Dockerfile.ubuntu-2004 .
@@ -105,7 +105,7 @@ jobs:
         uses: docker/setup-qemu-action@v2
 
       - name: Setup Docker Buildx
-        uses: docker/setup-buildx-action@v2.8.0
+        uses: docker/setup-buildx-action@v2.9.1
 
       - name: Build
         run: docker build -t gameservermanagers/steamcmd:ubuntu-18.04 -f  ./Dockerfile.ubuntu-1804 .