Update terminfo.mdx

Added sudo error from MacOS so folks using ghosty for the first time can directly search the docs

Author: seventeentwentynine

docs/help/terminfo.mdx

@@ -35,7 +35,7 @@ is available.
 ## Sudo
 
 If you use `sudo`, sudo may reset your environment variables and you may see
-an error about `missing or unsuitable terminal: xterm-ghostty` when running
+an error about `missing or unsuitable terminal: xterm-ghostty` or `'xterm-ghostty': unknown terminal type.` when running
 some programs.
 
 To resolve this, you must either configure sudo to preserve