RxExample now uses DispatchTimeInterval

[freak4pc]

RxExample was still using regular TimeInterval(s).

If we change the label as discussed in #1921, I'll change this from:

 .throttle(.milliseconds(500), scheduler: MainScheduler.instance)

to either

 .throttle(for: .milliseconds(500), scheduler: MainScheduler.instance)

or

 .throttle(duration: .milliseconds(500), scheduler: MainScheduler.instance)

[kzaher]

throttle(for sounds like the throttling will be performed for the first X period.
throttle(duration, could also be read as throttle for the first X period.

I like the version without parameter because if somebody knows what throttle does, he doesn't need additional info, and if he doesn't nothing can't create a wrong impression.

Let's not do a hasty rename for temporal operators, doesn't sound like an improvement to me.

[freak4pc]

Makes sense. Thanks !