message: docs(scheduler): Fix inconsistency with the naming
diff: @@ -82,7 +82,7 @@ observable.subscribe(finalObserver);
  console.log('just after subscribe');
  ```
  -The `proxyObserver` is created in `observeOn(Rx.Scheduler.async)`, and its `next(val)` function is approximately the following:
  +The `proxyObserver` is created in `observeOn(asyncScheduler)`, and its `next(val)` function is approximately the following:
  ```ts
  const proxyObserver = {
  