Update app.py

app.py

@@ -4,7 +4,7 @@ from gpt_index import GPTSimpleVectorIndex
 
 def search_gpt_index():
     # Load the GPT index from the file
-    with open('index.json', 'r') as f:
+    with open('index-4.json', 'r') as f:
         index_data = json.load(f)
     gpt_index = GPTSimpleVectorIndex(index_data)