message: docs(window): fix import syntax
diff: @@ -26,7 +26,7 @@ import { Operator } from '../Operator';
  * In every window of 1 second each, emit at most 2 click events
  * ```javascript
  * import { fromEvent, interval } from 'rxjs';
  - * import { window, mergeAll, map take } from 'rxjs/operators';
  + * import { window, mergeAll, map, take } from 'rxjs/operators';
  *
  * const clicks = fromEvent(document, 'click');
  * const sec = interval(1000);
  