docs(ts-to-js): change angular2 to @angular (#2403)

Author: Foxandxss

public/docs/js/latest/cookbook/ts-to-js.jade

@@ -59,7 +59,7 @@ table(width="100%")
         [the Angular 2 packages](../glossary.html#!#scoped-package),
         we can access Angular code through the global `ng` object. In the
         nested members of this object we'll find everything we would import
-        from `angular2` in TypeScript:
+        from `@angular` in TypeScript:
 
       +makeExample('cb-ts-to-js/js/app/main.js', 'ng2import')(format="." )