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

Author: renovate[bot]

.github/workflows/build.yml

@@ -75,7 +75,7 @@ jobs:
           sudo apt-get install docker.io=24.0.7-0ubuntu2~22.04.1
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Build KDC image
         uses: docker/build-push-action@v6