chore: update README with random example

Author: tzellman

README.md

@@ -27,13 +27,17 @@ ember install ember-fakerjs
 
 ### Helpers
 
-The main helper is `faker-fake`. You can use this to generate content using the entire faker API.
+The list of helpers available are:
 
-The addon ships with the following helpers: `faker-fake`, `faker-sentence`, `faker-sentences`, `faker-text`.
+-   `faker-fake` use this to generate content by directly using the `faker` API
+-   `random` utility that provides parameterized access to the `random` subsection of the `faker` API
+-   `faker-text`, `faker-sentence`, `faker-sentences` - generate lorem content
 
 Example usage:
 
 ```hbs
+{{random "number" max=100}}
+{{random "arrayelement" array("Link" "Ganon" "Zelda")}}
 {{faker-sentence 10}} {{!-- create a 10-word sentence --}}
 {{faker-sentences 5}} {{!-- create a 5-sentence string --}}
 <img src={{faker-fake "{{image.avatar}}"}} alt="avatar">