Update docker/setup-buildx-action action to v4

Author: renovate[bot]

.github/workflows/container-build.yaml

@@ -14,7 +14,7 @@ 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
         if: github.ref == 'refs/heads/main'