docs(architecture): "clicks" typo in the component section

closes #869
Change 'click' to 3rd person present, clicks.

public/docs/ts/latest/guide/architecture.jade

@@ -146,7 +146,7 @@ figure
   <a id="component-code"></a>
   A `HeroListComponent`, for example, might have a `heroes` property that returns an array of heroes
   that it acquired from a service.
-  It might have a `selectHero()` method that sets a `selectedHero` property when the user click on a hero from that list.
+  It might have a `selectHero()` method that sets a `selectedHero` property when the user clicks on a hero from that list.
   It might be a class like this:
 
 +makeExample('architecture/ts/app/hero-list.component.ts', 'class', 'app/hero-list.component.ts')