Update app.py

app.py

@@ -48,7 +48,7 @@ AA_ALPHABET = "ACDEFGHIKLMNPQRSTVWYX"
 # ---------------------------------------------------------
 def _load_ligandmpnn_parsers():
     """Load LigandMPNN parser functions directly from the HF Space root."""
-    parser_file = "data_utils.py"
+    parser_file = "LigandMPNN_data_utils.py"
     if not os.path.exists(parser_file):
         raise ImportError(
             "Could not find data_utils.py. "