Update docker/setup-buildx-action action to v4

Author: text-html-renovate[bot]

.github/workflows/build.yml

@@ -34,7 +34,7 @@ jobs:
         uses: docker/setup-qemu-action@v4
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Login to Docker Hub
         if: github.event_name != 'pull_request'