Update app.py

app.py

@@ -3,7 +3,9 @@
 import os
 import tempfile
 import streamlit as st
-from streamlit_chat import message
+# from streamlit_chat import message
+# https://pypi.org/project/streamlit-chat/
+from streamlit-chat import message
 from rag import ChatPDF
 
 st.set_page_config(page_title="ChatPDF")