Doc page using method that was moved

[maxkratt]

I wasn't sure how I should post this, as an issue, a discussion or just somewhere on the Discord, so here it is 😄.
This page mentions TimeManager.IsReplaying which was moved in 3.x to PredictionManager.IsReplaying.
Someone on the Discord had a problem locating the method as a result, and I figured the page should probably mention the new one.

[FirstGearGames]

Fixed btw and ty :)