Update app.py

app.py

@@ -9,7 +9,7 @@ from langchain.memory import ConversationBufferMemory
 from langchain.chains import ConversationChain
 from langchain.chains import ConversationalRetrievalChain
 # from langchain.document_loaders import UnstructuredFileLoader
-# from langchain_unstructured import UnstructuredFileLoader
+from langchain_unstructured import UnstructuredFileLoader
 from typing import List, Dict, Tuple
 import gradio as gr
 import validators