Revert id to original for update compatibility

CloudronManifest.json

@@ -1,6 +1,6 @@
 {
   "manifestVersion": 2,
-  "id": "io.inference.librechat.custom",
+  "id": "librechat-custom",
   "title": "LibreChat (Co‑op custom)",
   "description": "LibreChat sandbox with Inference‑Co‑op branding and image‑generation support.",
   "version": "1.3.1",