chore(deps): update docker/setup-buildx-action action to v4

Author: renovate[bot]

.github/workflows/CI.yml

@@ -500,7 +500,7 @@ jobs:
           # - { distro: "alpine", image: "setup-cpp-alpine", tag: "3.21", suffix: "-mingw", latest: true }
     steps:
       - 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