From where did you get this information?
Devlog approval is manual. This means, there is no cooldown, no guarantee, no nothing.
And in my opinion, this feature should be overhauled. People act like every update is a major update. That's not what major update means, and only major updates should be a cause for a refreshment.
Just do your updates and do not bother with optimisation. Itch does not like it, if people try to game the system.
Also, try not to use version numbers and clutter in your game's title or url with the next update. Your game is not named "update", so why should it appear in the url. You can put such informaion into the short tagline appearing under a game's name, or just put it into the cover image. Imagine what happens, if people try to share a url of your game.
(Also, this is community support and not tech support. You are not talking to Itch here and Itch is mostly not reading here.)