chore: replace deprecated neovim API

Author: alex-courtis

lua/nvim-web-devicons.lua

@@ -191,6 +191,7 @@ local function get_highlight_ctermfg(icon_data)
   local higroup = get_highlight_name(icon_data)
 
   if vim.fn.has "nvim-0.9" == 1 then
+    --- @type string
     --- @diagnostic disable-next-line: undefined-field  vim.api.keyset.hl_info specifies cterm, not ctermfg
     return vim.api.nvim_get_hl(0, { name = higroup, link = false }).ctermfg
   else