fix: nerd font 3 bookmark icon (#2203)

Author: moonfruit

lua/nvim-tree.lua

@@ -420,7 +420,7 @@ local DEFAULT_OPTS = { -- BEGIN_DEFAULT_OPTS
       glyphs = {
         default = "",
         symlink = "",
-        bookmark = "",
+        bookmark = "󰆤",
         modified = "●",
         folder = {
           arrow_closed = "",