Update app.py

add note about ref

app.py

@@ -499,6 +499,7 @@ with gr.Blocks() as demo:
   with gr.Row():
       top_k_box = gr.Slider(
           label="Number of Reference Papers",
+          info="Note: The number of reference papers may vary based on relevance. Only references that meet the similarity threshold will be included, so the final number may be less than specified.",
           value=10,
           minimum=10,
           maximum=30,