fix(model.py): Correct docstring (#6538)
fix(model.py): Correct docstring (#6538)

Co-authored-by: Greg Stephens <d7107ec51d7b87d0444bf9ef8c2021c224bb57d3@rasa.com>
RasaHQ/rasa_nlu,RasaHQ/rasa_nlu,RasaHQ/rasa_nlu