Bump docker/setup-buildx-action from 2.8.0 to 2.9.1 (MiczFlor#2052)

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](docker/setup-buildx-action@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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/docker_bullseye.yml

@@ -21,7 +21,7 @@ jobs:
       uses: docker/setup-qemu-action@v2.2.0
 
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@v2.8.0
+      uses: docker/setup-buildx-action@v2.9.1
 
     - name: Build Bullseye ARMv7
       uses: docker/build-push-action@v4

.github/workflows/docker_bullseye_altuser.yml

@@ -18,7 +18,7 @@ jobs:
       uses: docker/setup-qemu-action@v2.2.0
 
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@v2.8.0
+      uses: docker/setup-buildx-action@v2.9.1
 
     - name: Build altuser hans Bullseye ARMv7
       uses: docker/build-push-action@v4

.github/workflows/docker_buster.yml

@@ -18,7 +18,7 @@ jobs:
         uses: docker/setup-qemu-action@v2.2.0
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2.8.0
+        uses: docker/setup-buildx-action@v2.9.1
 
       - name: Build Buster ARMv7
         uses: docker/build-push-action@v4