Update docker/setup-buildx-action action to v4

Author: renovate[bot]

.github/workflows/release-docker.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           summarize: false
       - uses: DeterminateSystems/magic-nix-cache-action@v13
-      - uses: docker/setup-buildx-action@v3
+      - uses: docker/setup-buildx-action@v4
       - name: Login to DockerHub
         uses: docker/login-action@v3
         with: