Update app.py

app.py

@@ -1,7 +1,7 @@
 import streamlit as st
 import fitz  # PyMuPDF
 from transformers import pipeline
-from langchain.llms import HuggingFaceLLM
+from langchain_community.llms import HuggingFaceLLM
 from langchain.prompts import PromptTemplate
 from langchain.chains import LLMChain