Update docker/setup-buildx-action action to v4

Author: renovate[bot]

.github/workflows/ci.yml

@@ -135,7 +135,7 @@ jobs:
         uses: docker/setup-qemu-action@v3
 
       - name: Setup Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Build binaries and test
         run: |