Merge pull request #27 from toelke/renovate/docker-setup-buildx-actio…

…n-3.x

Update docker/setup-buildx-action action to v3

.github/workflows/build-docker.yaml

@@ -12,7 +12,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
       - name: Login to DockerHub
         uses: docker/login-action@v2
         with: