Fix Google Drive integration

backend/open_webui/routers/retrieval.py

@@ -347,7 +347,7 @@ async def get_rag_config(request: Request, user=Depends(get_admin_user)):
     return {
         "status": True,
         "pdf_extract_images": request.app.state.config.PDF_EXTRACT_IMAGES,
-        "ENABLE_GOOGLE_DRIVE_INTEGRATION": request.app.state.config.ENABLE_GOOGLE_DRIVE_INTEGRATION,
+        "enable_google_drive_integration": request.app.state.config.ENABLE_GOOGLE_DRIVE_INTEGRATION,
         "content_extraction": {
             "engine": request.app.state.config.CONTENT_EXTRACTION_ENGINE,
             "tika_server_url": request.app.state.config.TIKA_SERVER_URL,