Merge pull request #10 from appuio/renovate/docker-setup-buildx-action-3.x

Update docker/setup-buildx-action action to v3

Author: HappyTetrahedron

.github/workflows/release.yml

@@ -24,7 +24,7 @@ jobs:
         uses: docker/setup-qemu-action@v2
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
 
       - uses: actions/cache@v3
         with: