fix(autocmd): use WindowScrolled for nvim-0.8

[nickp-real]

I recently found it broken in nvim 0.8.2 WinResized is coming after nvim 0.9 So you might use nvim 0.9, I make the condition where if the user uses nvim 0.9, use the WinResized else Winscrolled.

[utilyre]

Thanks!