fix: missing bulk freighter

Author: Aeolun

models/ShipType.json

@@ -13,6 +13,7 @@
     "SHIP_LIGHT_SHUTTLE",
     "SHIP_ORE_HOUND",
     "SHIP_REFINING_FREIGHTER",
-    "SHIP_SURVEYOR"
+    "SHIP_SURVEYOR",
+    "SHIP_BULK_FREIGHTER"
   ]
 }