message: docs: correct the demo code of NgZone.run
  `NgZone.run` needs to be within the async closure, not around its registration, refer to:
  PR Close
diff: @@ -310,11 +310,11 @@ This function, and all asynchronous operations in that function, trigger change
  export class AppComponent implements OnInit {
  constructor(private ngZone: NgZone) {}
  ngOnInit() {
  - // New async API is not handled by Zone, so you need to
  - // use ngZone.run() to make the asynchronous operation in the Angular zone
  - // and trigger change detection automatically.
  - this.ngZone.run(() => {
  + // New async API is not handled by Zone, so you need to use ngZone.run()
  + // to make the asynchronous operation callback in the Angular zone and
  + // trigger change detection automatically.
  someNewAsyncAPI(() => {
  + this.ngZone.run(() => {
  // update the data of the component
  });
  });
  