Follow up to 644341a

NPC is now getting loaded on renewal.

npc/re/scripts_athena.conf

@@ -69,6 +69,7 @@ npc: npc/re/merchants/advanced_refiner.txt
 npc: npc/re/merchants/alchemist.txt
 npc: npc/re/merchants/ammo_boxes.txt
 npc: npc/re/merchants/ammo_dealer.txt
+npc: npc/re/merchants/bio4_reward.txt
 //npc: npc/re/merchants/blessed_refiner.txt
 //npc: npc/re/merchants/card_exchange.txt
 npc: npc/re/merchants/card_separation.txt