Update app.py

app.py

@@ -1,8 +1,8 @@
 import json
 import streamlit as st
-from gpt_index import GPTListIndex
+from gpt_index import GPTSimpleVectorIndex
 
-search_gpt_index = GPTListIndex.load_from_disk('index-4.json')
+search_gpt_index = GPTSimpleVectorIndex.load_from_disk('index-4.json')
 
 # Define the app layout
 st.title('GPT Search')