Fixes some golem oversights. (#30605)

code/modules/surgery/organs/brain.dm

@@ -208,6 +208,7 @@
 	desc = "A tightly furled roll of paper, covered with indecipherable runes."
 	icon = 'icons/obj/wizard.dmi'
 	icon_state = "scroll"
+	requires_golem_person = TRUE
 
 /obj/item/organ/internal/brain/cluwne
 

code/modules/surgery/organs/organ.dm

@@ -32,7 +32,8 @@
 	var/requires_robotic_bodypart = FALSE
 	/// When this variable is true, it can only be installed on the machine person species.
 	var/requires_machine_person = FALSE
-
+	/// When this variable is true, it can only be inserted on the golem species.
+	var/requires_golem_person = FALSE
 	///Should this organ be destroyed on removal?
 	var/destroy_on_removal = FALSE