Balance changes to prices for sec_supply (shiptest-ss13#2186)

## About The Pull Request

Changes to the prices of some items on sec_supply

## Why It's Good For The Game

slightly easier time getting things that arent deadly, slightly harder
time getting things that are deadly

## Changelog

:cl:
balance: Price change to the flamethrowers and combat knives on the
outposts shops!
/:cl:

code/modules/cargo/packs/sec_supply.dm

@@ -66,7 +66,7 @@
 /datum/supply_pack/sec_supply/combatknives
 	name = "Combat Knives Crate"
 	desc = "Contains three sharpened combat knives. Each knife guaranteed to fit snugly inside any galactic-standard boot."
-	cost = 3000
+	cost = 2500
 	contains = list(/obj/item/kitchen/knife/combat,
 					/obj/item/kitchen/knife/combat,
 					/obj/item/kitchen/knife/combat)
@@ -75,7 +75,7 @@
 /datum/supply_pack/sec_supply/fire
 	name = "Incendiary Weapons Crate"
 	desc = "Burn, baby burn. Contains three incendiary grenades and three prebuilt flamethrowers."
-	cost = 4500
+	cost = 5000
 	contains = list(
 		/obj/item/flamethrower/full,
 		/obj/item/flamethrower/full,