message: docs: update `flush` description to include microtasks
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diff: @@ -130,7 +130,8 @@ export function tick(
  }
  /**
  - * Simulates the asynchronous passage of time for the timers in the `fakeAsync` zone by
  + * Flushes any pending microtasks and simulates the asynchronous passage of time for the timers in
  + * the `fakeAsync` zone by
  * draining the macrotask queue until it is empty.
  *
  * @param maxTurns The maximum number of times the scheduler attempts to clear its queue before
  