Fixes SM ejection vent button (#5639)

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## About The Pull Request

Fixes the vent button. It's frankly ridiculous that it was an issue for
as long as it was.


https://github.com/Citadel-Station-13/Citadel-Station-13-RP/assets/25853190/99bc2e7f-f7aa-4f0e-8257-8ad96d2fd33b


## Why It's Good For The Game

Why do you think?

## Changelog

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:cl:
fix: Fixed the emergency supermatter engine core vent button.
/:cl:

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maps/rift/levels/rift-02-underground2.dmm

@@ -8335,13 +8335,12 @@
 	name = "Emergency Core Eject";
 	pixel_y = -21
 	},
-/obj/machinery/button/remote/airlock{
-	desc = "A remote control-switch for the engine core airlock hatch bolts.";
+/obj/machinery/button/remote/blast_door{
+	desc = "A remote control-switch for the engine core's emergency ejection vent.";
 	dir = 1;
 	id = "EngineVent";
-	name = "Engine Ejection Vent";
-	pixel_y = -32;
-	specialfunctions = 4
+	name = "Emergency Engine Ejection Vent";
+	pixel_y = -32
 	},
 /obj/structure/window/basic{
 	dir = 1