Merge pull request #806 from iosadchii/update-readme

Update method name in README

Author: lgebhardt

README.md

@@ -1416,17 +1416,17 @@ Pass a block, refer to controller class methods, or both. Note that methods must
 
 #### Action Callbacks
 
-##### ensure_correct_media_type
+##### verify_content_type_header
 
-By default, when controllers extend functionalities from `jsonapi-resources`, the `ActsAsResourceController#ensure_correct_media_type`
+By default, when controllers extend functionalities from `jsonapi-resources`, the `ActsAsResourceController#verify_content_type_header`
 method will be triggered before `create`, `update`, `create_relationship` and `update_relationship` actions. This method is reponsible
 for checking if client's request corresponds to the correct media type required by [JSON API](http://jsonapi.org/format/#content-negotiation-clients): `application/vnd.api+json`.
 
 In case you need to check the media type for custom actions, just make sure to call the method in your controller's `before_action`:
 
 ```ruby
 class UsersController < JSONAPI::ResourceController
-  before_action :ensure_correct_media_type, only: [:auth]
+  before_action :verify_content_type_header, only: [:auth]
 
   def auth
     # some crazy auth code goes here