Changes investigate logs to use a define

code/modules/hydroponics/grown/kudzu.dm

@@ -37,7 +37,7 @@
 		return FALSE
 	to_chat(user, "<span class='notice'>You plant [src].</span>")
 	message_admins("Kudzu planted by [ADMIN_LOOKUPFLW(user)] at [ADMIN_COORDJMP(user)]",0,1)
-	investigate_log("was planted by [key_name(user)] at [COORD(user)]","botany")
+	investigate_log("was planted by [key_name(user)] at [COORD(user)]", INVESTIGATE_BOTANY)
 	new /datum/spacevine_controller(get_turf(user), mutations, potency, production)
 	qdel(src)
 

code/modules/hydroponics/grown/mushrooms.dm

@@ -307,5 +307,5 @@
 	. = ..()
 	if(.)
 		message_admins("Shadowshroom planted by [ADMIN_LOOKUPFLW(user)] at [ADMIN_COORDJMP(user)]",0,1)
-		investigate_log("was planted by [key_name(user)] at [COORD(user)]", "botany")
+		investigate_log("was planted by [key_name(user)] at [COORD(user)]", INVESTIGATE_BOTANY)