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/modules/vending/_vending.dm

@@ -397,7 +397,7 @@ GLOBAL_LIST_EMPTY(vending_machines_to_restock)
 				return
 
 /**
- * Build the inventory of the vending machine from it's product and record lists
+ * Build the inventory of the vending machine from its product and record lists
  *
  * This builds up a full set of /datum/data/vending_products from the product list of the vending machine type
  * Arguments:
@@ -833,7 +833,7 @@ GLOBAL_LIST_EMPTY(vending_machines_to_restock)
  * * turf/target: The turf to fall onto. Cannot be null.
  * * damage: The raw numerical damage to do by default.
  * * chance_to_crit: The percent chance of a critical hit occuring. Default: 0
- * * forced_crit_case: If given a value from crushing.dm, [target] and it's contents will always be hit with that specific critical hit. Default: null
+ * * forced_crit_case: If given a value from crushing.dm, [target] and its contents will always be hit with that specific critical hit. Default: null
  * * paralyze_time: The time, in deciseconds, a given mob/living will be paralyzed for if crushed.
  * * crush_dir: The direction the crush is coming from. Default: dir of src to [target].
  * * damage_type: The type of damage to do. Default: BRUTE

code/modules/vending/magivend.dm

@@ -21,7 +21,7 @@
 	contraband = list(/obj/item/reagent_containers/cup/bottle/wizarditis = 1) //No one can get to the machine to hack it anyways; for the lulz - Microwave
 	armor_type = /datum/armor/vending_magivend
 	resistance_flags = FIRE_PROOF
-	default_price = 0 //Just in case, since it's primary use is storage.
+	default_price = 0 //Just in case, since its primary use is storage.
 	extra_price = PAYCHECK_COMMAND
 	payment_department = ACCOUNT_SRV
 	light_mask = "magivend-light-mask"