message: docs(forkJoin): Add missing import in forkJoin array example
diff: @@ -110,7 +110,7 @@ export function forkJoin<T>(...sources: ObservableInput<T>[]): Observable<T[]>;
  *
  * ### Use forkJoin with an array of observable inputs
  * ```ts
  - * import { forkJoin, of } from 'rxjs';
  + * import { forkJoin, of, timer } from 'rxjs';
  *
  * const observable = forkJoin([
  * of(1, 2, 3, 4),
  