chore(webui): update docker/setup-qemu-action action to v4

Author: renovate[bot]

.github/workflows/build-publish-docker.yml

@@ -37,7 +37,7 @@ jobs:
       - uses: actions/checkout@v7
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@v4
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3