Update main.py

main.py

@@ -5,7 +5,7 @@ from flask import Flask, request, jsonify, render_template
 from flask_cors import CORS 
 from langchain_groq import ChatGroq
 from langchain_text_splitters import RecursiveCharacterTextSplitter
-from langchain.chains.combine_documents import create_stuff_documents_chain
+from langchain.chains import create_stuff_documents_chain
 from langchain_core.prompts import ChatPromptTemplate
 from langchain.chains import create_retrieval_chain
 from langchain_community.vectorstores import FAISS