Update app.py

app.py

@@ -12,7 +12,7 @@ from langchain.chains import create_history_aware_retriever, create_retrieval_ch
 from langchain_community.chat_message_histories import ChatMessageHistory
 
 retriever = load_the_embedding_retrieve(is_ready=False, k=3)
-bm25_retriever = load_the_bm25_retrieve(k=3)
+bm25_retriever = load_the_bm25_retrieve(k=1)
 
 ensemble_retriever = EnsembleRetriever(
     retrievers=[bm25_retriever, retriever], weights=[0.2, 0.8]