ci: update docker/setup-buildx-action action to v2

.github/workflows/cd.yml

@@ -33,7 +33,7 @@ jobs:
 
     # https://github.com/marketplace/actions/build-and-push-docker-images
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@v1
+      uses: docker/setup-buildx-action@v2
 
     - name: Login to Docker Hub
       uses: docker/login-action@v2