fix: do compose down before compose up on demo workflow

Author: luandro

.github/workflows/demo-push-main.yml

@@ -26,4 +26,5 @@ jobs:
           script: |
             cd /srv/edt-offline
             git pull origin main
+            docker compose -f docker/demo/docker-compose.yml down
             docker compose -f docker/demo/docker-compose.yml up -d --build