Grammar: Te spelling mistake I've been staring at for hours (#73385)

## About The Pull Request

I noticed `/datum/tgui`'s DMDOC Comment on `var/title` misspelled `the`
as `te` while doing some unholy UI experiments, so I was going to PR a
correction so I can stop thinking about it. Though to be safe I checked
if it happened more than once, apparently it has happened thrice.

code/modules/tgui/tgui.dm

@@ -11,7 +11,7 @@
 	var/mob/user
 	/// The object which owns the UI.
 	var/datum/src_object
-	/// The title of te UI.
+	/// The title of the UI.
 	var/title
 	/// The window_id for browse() and onclose().
 	var/datum/tgui_window/window