Update app.py

app.py

@@ -6,7 +6,7 @@ import pickle
 from transformers import AutoTokenizer, PreTrainedModel, PretrainedConfig
 from huggingface_hub import login, hf_hub_download
 import time
-from utils.ch09util import subsequent_mask, create_model  # Ensure ch09util.py is available
+from ch09util import subsequent_mask, create_model  # Ensure ch09util.py is available
 
 # Device setup
 DEVICE = "cuda" if torch.cuda.is_available() else "cpu"