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/game/objects/items/rcd/RSF.dm

@@ -30,7 +30,7 @@ RSF
 	///The cost of the object we are going to dispense
 	var/dispense_cost = 0
 	w_class = WEIGHT_CLASS_NORMAL
-	///An associated list of atoms and charge costs. This can contain a separate list, as long as it's associated item is an object
+	///An associated list of atoms and charge costs. This can contain a separate list, as long as its associated item is an object
 	///The RSF item list below shows in the player facing ui in this order, this is why it isn't in alphabetical order, but instead sorted by category
 	var/list/cost_by_item = list(
 		/obj/item/reagent_containers/cup/glass/drinkingglass = 20,
@@ -47,7 +47,7 @@ RSF
 		/obj/item/pen = 50,
 		/obj/item/cigarette = 10,
 	)
-	///An associated list of fuel and it's value
+	///An associated list of fuel and its value
 	var/list/matter_by_item = list(/obj/item/rcd_ammo = 10,)
 	///A list of surfaces that we are allowed to place things on.
 	var/list/allowed_surfaces = list(/turf/open/floor, /obj/structure/table)