window divider foreground vs background

[gongzhitaao]

https://github.com/arcticicestudio/nord-emacs/blob/52756cdc909b29691eef228897b3de561cd99f43/nord-theme.el#L322

Setting :background as in the code gives me

Notice the white divider line above the minibuffer.

Setting :foreground gives me:

So I think the code should be

`(window-divider ((,class (:foreground ,nord3))))
`(window-divider-first-pixel ((,class (:foreground ,nord3))))
`(window-divider-last-pixel ((,class (:foreground ,nord3))))

[arcticicestudio]

Hi @gongzhitaao 👋, thanks for your contribution 👍
Great catch, this is a small but noticeable detail. I'll test the changes in the near future, but feel free to submit a PR if you like 😄