⬆️ Upgrade docker/setup-buildx-action action to v4

Author: renovate[bot]

.github/workflows/docker.yaml

@@ -18,7 +18,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Log in to GitHub Container Registry
         uses: docker/login-action@v3