message: docs: a typo fixed in the upgrade guide
  PR Close
diff: @@ -352,7 +352,7 @@ AngularJS and Angular approaches. Here's what happens:
  </figure>
  In practice, you do not need to call `$apply()`,
  -regardless of whether it is in AngularJS on Angular. The
  +regardless of whether it is in AngularJS or Angular. The
  `UpgradeModule` does it for us. You *can* still call `$apply()` so there
  is no need to remove such calls from existing code. Those calls just trigger
  additional AngularJS change detection checks in a hybrid application.
  