try to fix nvim hanging when it exits

lua/persisted/init.lua

@@ -113,6 +113,7 @@ end
 ---Save the session
 ---@param opts? { force?: boolean, session?: string }
 function M.save(opts)
+  vim.schedule(function()
     opts = opts or {}
 
     -- Do not save the session if should_save evals to false...unless it's forced
@@ -135,7 +136,6 @@ function M.save(opts)
     if type(config.save_pre) == "function" then
       config.save_pre()
     end
-  vim.schedule(function()
     vim.api.nvim_command("wa")
     vim.api.nvim_command("mksession! " .. e(opts.session or vim.g.persisting_session or M.current()))
   end)