Update app.py

app.py

@@ -355,7 +355,7 @@ label_mapping_reverse = {value: key for key, value in label_mapping.items()}
 
 
 # fetch data
-def fetch_and_update_training_data(arg2):
+def fetch_and_update_training_data(train_file):
     model_name = f"{arg7}"
     export_type = "sentence"