Update app.py

app.py

@@ -4,7 +4,7 @@ from langchain_community.vectorstores import FAISS
 from langchain_community.document_loaders import PyPDFLoader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain_community.embeddings import HuggingFaceEmbeddings 
-from langchain_community.llms import HuggingFaceEndpoint
+from langchain_huggingface import HuggingFaceEndpoint
 from langchain.chains import ConversationalRetrievalChain
 from langchain.memory import ConversationBufferMemory
 import torch