Update tutorial_basics.rst
Update tutorial_basics.rst

Updated the final project structure in the example bot tutorial to match the proper file type.
RasaHQ/rasa_nlu,RasaHQ/rasa_core,RasaHQ/rasa_nlu,RasaHQ/rasa_core,RasaHQ/rasa_nlu,RasaHQ/rasa_core