Update release notes

docs/topics/3.0-announcement.md

@@ -653,7 +653,7 @@ If you need to restore the previous behavior you can include the `AllowPUTAsCrea
 
 #### Customizing error responses.
 
-The generic views now raise `ValidationError` for invalid data. This exception is then dealt with by the exception handler, rather than the view returning a `400 Bad Request` response directly.
+The generic views now raise `ValidationFailed` exception for invalid data. This exception is then dealt with by the exception handler, rather than the view returning a `400 Bad Request` response directly.
 
 This change means that you can now easily customize the style of error responses across your entire API, without having to modify any of the generic views.