fix(utils): correctly check for showing buffer icons

Author: akinsho

lua/bufferline/utils/init.lua

@@ -217,7 +217,7 @@ function M.get_icon(opts)
     if icon then return icon, hl end
   end
 
-  if not config.show_buffer_icons then return "", "" end
+  if not config.options.show_buffer_icons then return "", "" end
   local loaded, webdev_icons = pcall(require, "nvim-web-devicons")
   if opts.directory then
     local hl = loaded and "DevIconDefault" or nil