fix(tokyonight): make punctuation slightly brighter

[cameronr]

Particularly noticeable improvement when doing:

eza --tree

[gierens]

I agree, the punctuation color is not good at the moment ... but #3b4261 seems to be out of palette in the file ... I think we should use #3d59a1 or #414868 ... they should be quite similar but are already part of the used colors in our tokyonight theme.

[cameronr]

I had been using folke/tokyonight.nvim as my reference but i see that #3b4261 is not in the vscode tokyonight.

#414868 looks appropriate to my eye so I'll change it to that.

[gierens]

LGTM! Thanks!