Swaps Air Tanks for Oxygen Tanks

New Perri-Air
Canned in Druidia
Naturally Sparkling
Salt Free Air
All Natural Druidia-- okay I'm done with this bit now.

code/datums/supplypacks/atmospherics.dm

@@ -86,7 +86,7 @@
 	name = "Internals crate"
 	contains = list(
 			/obj/item/clothing/mask/gas = 3,
-			/obj/item/tank/air = 3
+			/obj/item/tank/oxygen = 3
 			)
 	cost = 10
 	containertype = /obj/structure/closet/crate/aether

code/game/objects/structures/crates_lockers/closets/secure/scientist.dm

@@ -8,7 +8,7 @@
 		/obj/item/clothing/suit/storage/toggle/labcoat,
 		/obj/item/clothing/shoes/white,
 		/obj/item/radio/headset/headset_sci,
-		/obj/item/tank/air,
+		/obj/item/tank/oxygen,
 		/obj/item/clothing/mask/gas,
 		/obj/item/clothing/suit/storage/hooded/wintercoat/science,
 		/obj/item/clothing/shoes/boots/winter/science)
@@ -40,7 +40,7 @@
 		/obj/item/clothing/gloves/sterile/latex,
 		/obj/item/radio/headset/heads/rd,
 		/obj/item/radio/headset/heads/rd/alt,
-		/obj/item/tank/air,
+		/obj/item/tank/oxygen,
 		/obj/item/clothing/mask/gas,
 		/obj/item/flash,
 		/obj/item/clothing/suit/storage/hooded/wintercoat/science,