docs(overview): corrected grammatical error (#5547)
docs(overview): corrected grammatical error (#5547)

Co-authored-by: Rishabh Gour <98f86c1510edd2ac0b963ed108701b04589bcb78@evorait.com>
ReactiveX/RxJS,benlesh/RxJS,benlesh/RxJS,martinsik/rxjs,ReactiveX/RxJS,ReactiveX/RxJS,martinsik/rxjs,ReactiveX/rxjs,benlesh/RxJS,kwonoj/RxJS,kwonoj/RxJS,kwonoj/RxJS,kwonoj/RxJS,ReactiveX/RxJS,martinsik/rxjs,ReactiveX/rxjs,ReactiveX/rxjs,benlesh/RxJS,ReactiveX/rxjs,martinsik/rxjs