Update docs/user-guide/testing-your-assistant.rst
Update docs/user-guide/testing-your-assistant.rst

Co-Authored-By: Ty Dunn <7c464d66e0c0ba46ac5478ea4ed7eec68b291ac5@rasa.com>
RasaHQ/rasa_nlu,RasaHQ/rasa_nlu,RasaHQ/rasa_nlu