Bump docker/setup-buildx-action from 2.8.0 to 2.9.1

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@16c0bc4...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/build-oss.yml

@@ -48,7 +48,7 @@ jobs:
         if: ${{ github.event_name != 'pull_request' && ! startsWith(github.ref, 'refs/heads/release-') }}
 
       - name: Docker Buildx
-        uses: docker/setup-buildx-action@16c0bc4a6e6ada2cfd8afd41d22d95379cf7c32a # v2.8.0
+        uses: docker/setup-buildx-action@4c0219f9ac95b02789c1075625400b2acbff50b1 # v2.9.1
 
       - name: DockerHub Login
         uses: docker/login-action@465a07811f14bebb1938fbed4728c6a1ff8901fc # v2.2.0

.github/workflows/build-plus.yml

@@ -52,7 +52,7 @@ jobs:
         if: github.event_name != 'pull_request'
 
       - name: Docker Buildx
-        uses: docker/setup-buildx-action@16c0bc4a6e6ada2cfd8afd41d22d95379cf7c32a # v2.8.0
+        uses: docker/setup-buildx-action@4c0219f9ac95b02789c1075625400b2acbff50b1 # v2.9.1
 
       - name: Authenticate to Google Cloud
         id: auth

.github/workflows/ci.yml

@@ -171,7 +171,7 @@ jobs:
           path: ${{ github.workspace }}/dist
           key: nginx-ingress-${{ github.run_id }}-${{ github.run_number }}
       - name: Docker Buildx
-        uses: docker/setup-buildx-action@16c0bc4a6e6ada2cfd8afd41d22d95379cf7c32a # v2.8.0
+        uses: docker/setup-buildx-action@4c0219f9ac95b02789c1075625400b2acbff50b1 # v2.9.1
       - name: Build Docker Image ${{ matrix.image }}
         uses: docker/build-push-action@2eb1c1961a95fc15694676618e422e8ba1d63825 # v4.1.1
         with:
@@ -259,7 +259,7 @@ jobs:
       - name: Checkout Repository
         uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
       - name: Docker Buildx
-        uses: docker/setup-buildx-action@16c0bc4a6e6ada2cfd8afd41d22d95379cf7c32a # v2.8.0
+        uses: docker/setup-buildx-action@4c0219f9ac95b02789c1075625400b2acbff50b1 # v2.9.1
       - name: Build Test-Runner Container
         uses: docker/build-push-action@2eb1c1961a95fc15694676618e422e8ba1d63825 # v4.1.1
         with: