Update app.py

Similarity k to two

app.py

@@ -15,12 +15,12 @@ storage_context = StorageContext.from_defaults(persist_dir='./storage')
 indx = load_indices_from_storage(storage_context)
 
 from llama_index.query_engine import CitationQueryEngine
-query_engine = CitationQueryEngine.from_args(index=indx[1], similarity_top_k=4)
+query_engine = CitationQueryEngine.from_args(index=indx[1], similarity_top_k=2)
 list_query_engine = indx[0].as_query_engine(
     response_mode='tree_summarize',
     use_async=True,
 )
-vector_query_engine = indx[1].as_query_engine(similarity_top_k=4)
+vector_query_engine = indx[1].as_query_engine(similarity_top_k=2)
 
 import gradio as gr
 def chatbot(input_text, is_qen):