added module to the readme command list (#3374)

Author: johnpapa

packages/angular-cli/blueprints/ng2/files/README.md

@@ -7,7 +7,7 @@ Run `ng serve` for a dev server. Navigate to `http://localhost:4200/`. The app w
 
 ## Code scaffolding
 
-Run `ng generate component component-name` to generate a new component. You can also use `ng generate directive/pipe/service/class`.
+Run `ng generate component component-name` to generate a new component. You can also use `ng generate directive/pipe/service/class/module`.
 
 ## Build