Fixes open crate sprites (#17050)

* fakin underscores

* more crates

* sneak this one in too

code/modules/mining/lavaland/necropolis_chests.dm

@@ -4,7 +4,7 @@
 	name = "necropolis chest"
 	desc = "It's watching you closely."
 	icon_state = "necrocrate"
-	icon_opened = "necrocrateopen"
+	icon_opened = "necrocrate_open"
 	icon_closed = "necrocrate"
 	resistance_flags = LAVA_PROOF | FIRE_PROOF | ACID_PROOF
 

code/modules/mining/mine_items.dm

@@ -84,5 +84,5 @@
 	name = "mining car (not for rails)"
 	icon_state = "miningcar"
 	density = 1
-	icon_opened = "miningcaropen"
+	icon_opened = "miningcar_open"
 	icon_closed = "miningcar"