message: Fixed typo for Facebook NLP disable api
diff: @@ -545,7 +545,7 @@ If specified, `message.nlp.entities` will include a list of entities and intents
  Facebook's NLP option can be enabled by calling `controller.api.nlp.enable()` in your Botkit app.
  -Facebook's NLP option can be disabled by calling `controller.api.nlp.enable()` in your Botkit app.
  +Facebook's NLP option can be disabled by calling `controller.api.nlp.disable()` in your Botkit app.
  ## Message Tags
  