Add local.lua example config to comment

wezterm.lua

@@ -104,6 +104,14 @@ local try_require = function(module)
   pcall(function() require(module)(wezterm, config) end)
 end;
 
+-- Example of ~/.config/wezterm/local.lua to set the window size
+--
+-- ```lua
+-- return function(wezterm, config)
+--   config.initial_rows = 107
+--   config.initial_cols = 322
+-- end
+-- ```
 try_require('local')
 
 return config