fix typo `ingored` (#5938)
fix typo `ingored` (#5938)

just fix few typo.
NiteshKant/RxJava,ReactiveX/RxJava,reactivex/rxjava,NiteshKant/RxJava,ReactiveX/RxJava,artem-zinnatullin/RxJava,reactivex/rxjava,artem-zinnatullin/RxJava