minor fix

app/main.py

@@ -53,7 +53,7 @@ async def websocket_endpoint(websocket: WebSocket, client_id: int):
             data = await websocket.receive_text().strip()
             if len(data) > 0:
                 generator = session_assistant.ask(data)
-                for text in generator
+                for text in generator:
                     message = {"time":current_time,"clientId":client_id,"message":text}
                     # await manager.broadcast(json.dumps(message))
                     await manager.send_personal_message(json.dumps(message), websocket)