Update docling endpoint

backend/open_webui/retrieval/loaders/main.py

@@ -181,7 +181,7 @@ class DoclingLoader:
                         if lang.strip()
                     ]
 
-            endpoint = f"{self.url}/v1alpha/convert/file"
+            endpoint = f"{self.url}/v1/convert/file"
             r = requests.post(endpoint, files=files, data=params)
 
         if r.ok: