Update model.py

src/models/model.py

@@ -142,7 +142,7 @@ class PLDataModule(LightningDataModule):
     def val_dataloader(self):
         """ validation dataloader """
         return DataLoader(
-            self.test_dataset, batch_size=self.batch_size, shuffle=False, num_workers=2
+            self.test_dataset, batch_size=self.batch_size, shuffle=False, num_workers=self.num_workers
         )