Update model.py

src/models/model.py

@@ -290,6 +290,7 @@ class Summarization:
             early_stopping_patience_epochs: int = 0,  # 0 to disable early stopping feature
             learning_rate: float = 0.0001,
             adam_epsilon: float = 0.01,
+            num_workers: int = 2,
     ):
         """
         trains T5/MT5 model on custom dataset