[data.datamodule] Minor doc fixes

src/ptbench/data/datamodule.py

@@ -429,7 +429,7 @@ class CachingDataModule(lightning.LightningDataModule):
         the system.  Set to >= 1 to enable that many multiprocessing
         instances for data loading.
 
-        It sets the parameter ``num_workers`` (from Dataloaders) to match the
+        It sets the parameter ``num_workers`` (from DataLoaders) to match the
         expected pytorch representation.  For macOS machines, it also sets the
         ``multiprocessing_context`` to use ``spawn`` instead of the default.