new icons for the forcefield projector and the atmos projector (#40483)

cl
sprites: new icon for the atmos projector and forcefield projector
/cl
new icons

code/game/objects/items/devices/forcefieldprojector.dm

@@ -2,7 +2,7 @@
 	name = "forcefield projector"
 	desc = "An experimental device that can create several forcefields at a distance."
 	icon = 'icons/obj/device.dmi'
-	icon_state = "signmaker_engi"
+	icon_state = "signmaker_forcefield"
 	slot_flags = ITEM_SLOT_BELT
 	w_class = WEIGHT_CLASS_SMALL
 	item_flags = NOBLUDGEON

code/game/objects/items/holosign_creator.dm

@@ -85,7 +85,7 @@
 /obj/item/holosign_creator/atmos
 	name = "ATMOS holofan projector"
 	desc = "A holographic projector that creates holographic barriers that prevent changes in atmosphere conditions."
-	icon_state = "signmaker_engi"
+	icon_state = "signmaker_atmos"
 	holosign_type = /obj/structure/holosign/barrier/atmos
 	creation_time = 0
 	max_signs = 3