renames DIA badge to investigator badge (#11992)

code/game/objects/structures/crates_lockers/closets/secure/security.dm

@@ -387,7 +387,7 @@
 	new /obj/item/clothing/suit/storage/toggle/labcoat(src)
 	new /obj/item/clothing/under/det/black(src)
 	new /obj/item/clothing/under/det/classic(src)
-	new /obj/item/clothing/accessory/badge/dia(src)
+	new /obj/item/clothing/accessory/badge/investigator(src)
 	new /obj/item/clothing/suit/storage/toggle/forensics(src)
 	new /obj/item/clothing/gloves/black/forensic(src)
 	new /obj/item/clothing/shoes/brown(src)

code/modules/client/preference_setup/loadout/loadout_accessories.dm

@@ -250,7 +250,7 @@
 
 /datum/gear/accessory/detbadge
 	display_name = "badge, investigations"
-	path = /obj/item/clothing/accessory/badge/dia
+	path = /obj/item/clothing/accessory/badge/investigator
 	allowed_roles = list("Investigator")
 
 /datum/gear/accessory/badge

code/modules/clothing/under/accessories/badges.dm

@@ -223,11 +223,11 @@
 	icon_state = "marshalbadge"
 	badge_string = "Federal Marshal"
 
-/obj/item/clothing/accessory/badge/dia
-	name = "\improper DIA badge"
+/obj/item/clothing/accessory/badge/investigator
+	name = "\improper investigator badge"
 	desc = "This badge marks the holder as an investigative agent."
-	icon_state = "diabadge"
-	overlay_state = "diabadge"
+	icon_state = "invbadge"
+	overlay_state = "invbadge"
 	badge_string = "Corporate Investigator"
 
 /obj/item/clothing/accessory/badge/idbadge