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/datums/elements/bane.dm

@@ -1,5 +1,5 @@
 /// Deals extra damage to mobs of a certain type, species, or biotype.
-/// This doesn't directly modify the normal damage of the weapon, instead it applies it's own damage seperatedly ON TOP of normal damage
+/// This doesn't directly modify the normal damage of the weapon, instead it applies its own damage seperatedly ON TOP of normal damage
 /// ie. a sword that does 10 damage with a bane elment attacthed that has a 0.5 damage_multiplier will do:
 /// 10 damage from the swords normal attack + 5 damage (50%) from the bane element
 /datum/element/bane

code/datums/elements/gags_recolorable.dm

@@ -10,7 +10,7 @@
 
 /datum/element/gags_recolorable/proc/on_examine(atom/source, mob/user, list/examine_text)
 	SIGNAL_HANDLER
-	examine_text += span_notice("Now utilising PPP recolouring technology, capable of absorbing paint and pigments for changing it's colours!")
+	examine_text += span_notice("Now utilising PPP recolouring technology, capable of absorbing paint and pigments for changing its colours!")
 
 /datum/element/gags_recolorable/proc/on_attackby(datum/source, obj/item/attacking_item, mob/user)
 	SIGNAL_HANDLER