Update app.py

app.py

@@ -1,5 +1,5 @@
 
-from llama_index import VectorStoreIndex,download_loader, VectorStoreIndex, ServiceContext, StorageContext, load_index_from_storage
+from llama_index.core import VectorStoreIndex,download_loader, VectorStoreIndex, ServiceContext, StorageContext, load_index_from_storage
 from pathlib import Path
 from github import Github
 import os