incorrect 'angular2/angular2' import in cheatsheet

[khronic]

Problem on page - https://angular.io/cheatsheet

Under the "bootstrap" section:
import {bootstrap} from 'angular2/angular2';
Should be:
import {bootstrap} from 'angular2/platform/browser';

[filipesilva]

Thanks for spotting this! Putting up a pr to fix it soon.