Requisitions delivery outlet fix (cmss13-devs#5436)

# About the pull request
Fixes the sprite overlay when requisitions delivery tube spits out
items.
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# Explain why it's good for the game
# Testing Photographs and Procedure
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# Changelog
:cl:
fix: Fixes requisitions delivery tube output overlaying default sprite.
/:cl:

code/modules/recycling/disposal.dm

@@ -1377,7 +1377,7 @@
 //Expel the contents of the holder object, then delete it. Called when the holder exits the outlet
 /obj/structure/disposaloutlet/proc/expel(obj/structure/disposalholder/H)
 
-	flick("outlet-open", src)
+	flick("[icon_state]-open", src)
 	playsound(src, 'sound/machines/warning-buzzer.ogg', 25, 0)
 	sleep(20) //Wait until correct animation frame
 	playsound(src, 'sound/machines/hiss.ogg', 25, 0)