Update docker/setup-qemu-action action to v4

Author: renovate[bot]

.github/workflows/cd.yaml

@@ -176,7 +176,7 @@ jobs:
           path: .  # Explicitly set to root to match Dockerfile COPY paths
 
       - 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