ci: bump docker/setup-buildx-action to v3

.github/workflows/buildx.yml

@@ -43,7 +43,7 @@ jobs:
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx
         id: buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v3
       - name: Available platforms
         run: echo ${{ steps.buildx.outputs.platforms }}
       - name: Cache Docker layers