Update app.py

app.py

@@ -1,7 +1,7 @@
 # app.py  – CPU-only summariser for Hugging Face Spaces (free tier)
 from optimum.onnxruntime import ORTModelForSeq2SeqLM
 import textwrap, gradio as gr
-from transformers import pipeline
+from transformers import AutoTokenizer, pipeline
 
 # 1️⃣  small, open model that needs no access-token
 MODEL_ID = "Xenova/distilbart-cnn-6-6"