Update app.py

app.py

@@ -1,6 +1,6 @@
 import streamlit as st
 
-from langchain.llms import HuggingFaceHub
+from langchain_openai import HuggingFaceHub
 
 st.set_page_config(page_tile = "Langchain Chatbot" , page_icon = ":robot:")
 st.setheader("Langchain Demo")