fix(lua): @private => @nodoc #32587

Problem:
vim.log.levels.* and vim.opt_local are marked `@private` but they should be `@nodoc`.

Solution:
Fix the annotation.

runtime/lua/vim/_editor.lua

@@ -56,7 +56,7 @@ vim._extra = {
   inspect_pos = true,
 }
 
---- @private
+--- @nodoc
 vim.log = {
   --- @enum vim.log.levels
   levels = {