Merge pull request #3770 from QYG2297248353/renovate/ghcr.io-open-webui-open-webui-0.x

chore(deps): update ghcr.io/open-webui/open-webui docker tag to v0.6.40

apps/open-webui/0.6.40/docker-compose.yml

@@ -4,7 +4,7 @@ networks:
 
 services:
   open-webui:
-    image: ghcr.io/open-webui/open-webui:0.6.38
+    image: ghcr.io/open-webui/open-webui:0.6.40
     container_name: ${CONTAINER_NAME}
     labels:
       createdBy: "Apps"