Fixes typo in Dialogflow test
Fixes typo in Dialogflow test

Bug: 67953017
Change-Id: I5dabf16a9867105f2ebf470a7abf5c32c987bb1c

actions-on-google/actions-on-google-nodejs,actions-on-google/actions-on-google-nodejs,actions-on-google/actions-on-google-nodejs