Update docker/setup-buildx-action action to v4

Author: renovate[bot]

.github/workflows/docker.yml

@@ -20,7 +20,7 @@ jobs:
       packages: write
     steps:
       - uses: actions/checkout@v4
-      - uses: docker/setup-buildx-action@v3
+      - uses: docker/setup-buildx-action@v4
       - id: meta
         uses: docker/metadata-action@v5
         with: