minor fix

app/main.py

@@ -57,7 +57,7 @@ async def websocket_endpoint(websocket: WebSocket, client_id: int):
                     message = {"time":current_time,"clientId":client_id,"message":"Please, add a PDF document first."}
                     # await manager.broadcast(json.dumps(message))
                     await manager.send_personal_message(json.dumps(message), websocket)
-                else
+                else:
                     print("FETCHING STREAM")
                     streaming_response = session_assistant.ask(data)
                     print("STARTING STREAM")