Corrects 200+ instances of "it's" where it should've been "its" instead (#85169)

## About The Pull Request

it's - conjunction of "it" and "is"
its - possessive form of "it"

grammar is hard, and there were a lot of places where "it's" was used
where it shouldn't have been. i went and painstakingly searched the
entire repository for these instances, spending a few hours on it. i
completely ignored the changelog archive, and i may have missed some
outliers. most player-facing ones should be corrected, though
## Why It's Good For The Game
proper grammar is good

## Changelog
🆑
spellcheck: Numerous instances of "it's" have been properly replaced
with "its"
/🆑

code/controllers/subsystem/transport.dm

@@ -98,7 +98,7 @@ PROCESSING_SUBSYSTEM_DEF(transport)
 	// We've made it this far, tram is physically fine so let's trip plan
 	// This is based on the destination nav beacon, the logical location
 	// If Something Happens and the location the controller thinks it's at
-	// gets out of sync with it's actual physical location, it can be reset
+	// gets out of sync with its actual physical location, it can be reset
 
 	// Since players can set the platform ID themselves, make sure it's a valid platform we're aware of
 	var/network = LAZYACCESS(nav_beacons, transport_id)