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/effects/anomalies/anomalies_gravity.dm

@@ -61,7 +61,7 @@
 			if(target && !target.stat)
 				O.throw_at(target, 5, 10)
 
-	//anomaly quickly contracts then slowly expands it's ring
+	//anomaly quickly contracts then slowly expands its ring
 	animate(warp, time = seconds_per_tick*3, transform = matrix().Scale(0.5,0.5))
 	animate(time = seconds_per_tick*7, transform = matrix())
 

code/game/objects/effects/phased_mob.dm

@@ -92,7 +92,7 @@
 		to_chat(user, span_warning("Some strange aura is blocking the way."))
 		return
 	if(destination_area.area_flags & NOTELEPORT || SSmapping.level_trait(newloc.z, ZTRAIT_NOPHASE))
-		to_chat(user, span_danger("Some dull, universal force is blocking the way. It's overwhelmingly oppressive force feels dangerous."))
+		to_chat(user, span_danger("Some dull, universal force is blocking the way. Its overwhelmingly oppressive force feels dangerous."))
 		return
 	if (direction == UP || direction == DOWN)
 		newloc = can_z_move(direction, get_turf(src), newloc, ZMOVE_INCAPACITATED_CHECKS | ZMOVE_FEEDBACK | ZMOVE_ALLOW_ANCHORED, user)