fix(hues): stop highlighting @none

Details:
- On 'nvim-treesitter' (the source of `@none` group) `master` branch the
  group is described as "completely disable the highlight". The way to
  achieve that is to link to `Normal`.
  However, on 'nvim-treesitter' `main` branch (soon-to-be-default) this
  group is missing from documentation and is meant to "do nothing" (as
  apparently it was meant to on `master` branch).
- Some tree-sitter parser+query combinations use it as initial "layer"
  before applying differnt highlight groups on top. This results into
  parts of syntax highlighting stand out from cursorline, which is not
  great.  See #1256.

Author: echasnovski

lua/mini/hues.lua

@@ -726,7 +726,7 @@ MiniHues.apply_palette = function(palette, plugins)
   hi('@tag',              { link='Tag' })
 
   hi('@symbol', { link='Keyword' })
-  hi('@none',   { link='Normal' })
+  hi('@none',   {})
 
   -- Semantic tokens
   if vim.fn.has('nvim-0.9') == 1 then