Fixes infestation spawns happening outside the Horizon (#13565)

code/game/area/areas.dm

@@ -442,6 +442,8 @@ var/list/mob/living/forced_ambiance_list = new
 			continue
 		if (istype(A, /area/mine))
 			continue
+		if (istype(A, /area/horizonexterior))
+			continue
 
 		//Although hostile mobs instadying to turrets is fun
 		//If there's no AI they'll just be hit with stunbeams all day and spam the attack logs.

html/changelogs/doxxmedearly-eventspawn_inside.yml

@@ -0,0 +1,4 @@
+author: Doxxmedearly
+delete-after: True
+changes:
+  - bugfix: "Random event spawns (Such as rats and crates) should now only spawn on the inside of the Horizon."