Document Battle Pyramid scripts

include/battle_pyramid_bag.h

@@ -43,7 +43,7 @@ void sub_81C4EFC(void);
 void GoToBattlePyramidBagMenu(u8 a0, void (*callback)(void));
 void sub_81C6714(u8 taskId);
 void TryStoreHeldItemsInPyramidBag(void);
-void sub_81C4F24(void);
+void ChooseItemsToTossFromPyramidBag(void);
 void sub_81C5B14(u8 taskId);
 void DisplayItemMessageInBattlePyramid(u8 taskId, const u8 *str, void (*callback)(u8 taskId));