add syndicate tech requirement

code/game/mecha/mecha_modkit.dm

@@ -49,6 +49,7 @@
 /obj/item/mecha_modkit/voice/syndicate
 	name = "mecha voice modification kit : Syndicate"
 	desc = "This suspicious modification kit updates a mech's onboard voice to Syndicate."
+	origin_tech = "syndicate=1"
 	nominalsound = 'sound/mecha/nominalsyndi.ogg'
 	zoomsound = 'sound/mecha/imag_enhsyndi.ogg'
 	critdestrsound = 'sound/mecha/critdestrsyndi.ogg'

code/modules/research/designs/mechfabricator_designs.dm

@@ -1232,6 +1232,7 @@
 	id = "voice_syndicate"
 	build_type = MECHFAB
 	materials = list(MAT_METAL = 400, MAT_TITANIUM = 100)
+	req_tech = list("syndicate" = 2)
 	construction_time = 50
 	build_path = /obj/item/mecha_modkit/voice/syndicate
 	category = list("Misc")