Update app.py

app.py

@@ -2,7 +2,7 @@ import langchain
 import streamlit as st
 import pickle as pkl
 from langchain.chains import RetrievalQAWithSourcesChain
-from langchain_community.document_loaders import UnstructuredURLLoader
+from langchain.document_loaders import UnstructuredURLLoader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.embeddings import SentenceTransformerEmbeddings
 from langchain.vectorstores import Chroma, FAISS