Renamed TM flags to keep consistency with the rest of the repo

data/maps/AbandonedShip_Room_B1F/map.json

@@ -25,7 +25,7 @@
       "trainer_type": "TRAINER_TYPE_NONE",
       "trainer_sight_or_berry_tree_id": "0",
       "script": "AbandonedShip_Room_B1F_EventScript_ItemTM13",
-      "flag": "FLAG_ITEM_ABANDONED_SHIP_ROOMS_B1F_TM_13"
+      "flag": "FLAG_ITEM_ABANDONED_SHIP_ROOMS_B1F_TM13"
     }
   ],
   "warp_events": [