cmp windows don't auto hide when exec snippet_forward/snippet_backward

[Parsifa1]

ref to #537 (comment)

Make sure you have done the following

• I have updated to the latest version of blink.cmp
• I have read the README

Bug Description

I think we should instead figure out why buffer_events doesn't emit a cursor moved when jumping between placeholders. It seems likely it's caused by using CursorMovedI instead of CursorMoved and checking if the mode is i or s

@Saghen you are right.
https://github.com/saghen/blink.cmp/blob/f99b03c756b32680eea28e89f95e3c6987cc6c80/lua/blink/cmp/lib/buffer_events.lua#L66-L69

I changed the "CursorMovedI" on the autocmd to "CursorMoved" and it was fixed.
I dont know if it will cause sth going wrong, but we don't have sth like CursorMovedS