updated buildx version

.gitea/workflows/docker.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Checkout main
         uses: actions/checkout@v4
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
       - name: Login to Docker Hub
         uses: docker/login-action@v3
         with: