Update app.py

app.py

@@ -242,8 +242,8 @@ def get_article_and_arxiv_content(query):
 
 
 def file_nodes_vector():
-    PERSIST_DIR_vector = "vectors/vectors/vector_index"
-    PERSIST_DIR_keyword = "vectors/vectors/keyword_index"
+    PERSIST_DIR_vector = "vectors/vector_index"
+    PERSIST_DIR_keyword = "vectors/keyword_index"
 
     if not os.path.exists(PERSIST_DIR_vector):
         os.makedirs(PERSIST_DIR_vector)