Merge branch 'typo' into 'master'

fix typo on documentation

See merge request !7

docs/tutorial/DataNotification.md

@@ -33,7 +33,7 @@ The topics below describe these steps/APIs in detail that allow consumers to cre
 Consumer uses Data notification "topics" API to view the list of supported notification topics and corresponding sample messages.
 
 ```
-POST api/register/v1/topics
+GET api/register/v1/topics
 ```
 <details><summary>curl</summary>