Clarify the data/dodrio_berry_picking.h include

src/dodrio_berry_picking.c

@@ -137,6 +137,7 @@ static void sub_81538D0(u8 windowId);
 
 // const rom data
 
+// Assets in this header are duplicated
 #include "data/dodrio_berry_picking.h"
 
 static const u8 sUnknown_847553C[][3] =

src/dodrio_berry_picking_2.c

@@ -53,6 +53,7 @@ MainCallback sub_8155E54(void);
 static void sub_8155EA0(void);
 static bool32 sub_8155FE0(void);
 
+// Assets in this header are duplicated
 #include "data/dodrio_berry_picking.h"
 
 static const struct OamData sOamData_8478C98 =