[MIRROR] [NO GBP] Fixes spurious CI failures from museum ash spawns (…

…for real this time) (#2162)

* [NO GBP] Fixes spurious CI failures from museum ash spawns (for real this time) (#81690)

## About The Pull Request

I saw this runtime again despite thinking I fixed it and then realized I
needed to be calling `ispath()` since we are not working with an
instantiated object with these lists. Oops

## Why It's Good For The Game

Working code is good

## Changelog

Nothing player facing

* [NO GBP] Fixes spurious CI failures from museum ash spawns (for real this time)

---------

Co-authored-by: NovaBot <[email protected]>
Co-authored-by: Bloop <[email protected]>

code/game/objects/effects/spawners/random/maintenance.dm

@@ -9,7 +9,7 @@
 /obj/effect/spawner/random/maintenance/no_decals
 
 /obj/effect/spawner/random/maintenance/no_decals/can_spawn(atom/loot)
-	return !istype(loot, /obj/effect/decal)
+	return !ispath(loot, /obj/effect/decal)
 
 /obj/effect/spawner/random/maintenance/examine(mob/user)
 	. = ..()