Update app.py

app.py

@@ -1,6 +1,6 @@
 from flask import Flask, render_template, jsonify, request
 from src.helper import download_hugging_face_embeddings
-from langchain.vectorstores import Pinecone
+from langchain_community.vectorstores import Pinecone
 from langchain_openai import OpenAI
 from langchain.chains import create_retrieval_chain
 from langchain.chains.combine_documents import create_stuff_documents_chain