Fixes to donator backpack icon (#4800)

# About the pull request

Fixes donator backpack sprite being invisible on certain maps

# Explain why it's good for the game

Fixes visual sprite glitch for donator item on certain maps



# Changelog
:cl:
fix: Fixed sprite issue by disabling camo variant for donator item
/:cl:

code/modules/cm_marines/Donator_Items.dm

@@ -1366,7 +1366,8 @@
 	name = "tactical radiopack"
 	desc = "A Radio backpack for use with the Juggernaut armor. DONOR ITEM"
 	icon_state = "skinnerpack"
-	item_state = "skinnerpack"
+	item_state = "securitypack"
+	has_gamemode_skin = FALSE //same sprite for all gamemodes.
 
 /obj/item/clothing/glasses/fluff/alexwarhammer
 	name = "Black Jack's Dank Shades"