Update rasa/nlu/classifiers/diet_classifier.py
Update rasa/nlu/classifiers/diet_classifier.py

Co-Authored-By: Tobias Wochinger <5ab5657415213e16a8561b9cb7fb27e3a8c539ed@rasa.com>
RasaHQ/rasa_nlu,RasaHQ/rasa_nlu,RasaHQ/rasa_nlu