Update app.py

app.py

@@ -1,7 +1,7 @@
 from fastapi import FastAPI, HTTPException
 from pydantic import BaseModel
 from langchain import LLMChain
-from langchain.llms import Llama
+from langchain.llms import LlamaCpp
 from concurrent.futures import ThreadPoolExecutor, as_completed
 from tqdm import tqdm
 import uvicorn