Rename song constants using Japanese sound test menu

src/title_screen.c

@@ -285,7 +285,7 @@ void CB2_InitTitleScreen(void)
             sTitleScreenTimerTaskId = CreateTask(Task_TitleScreenTimer, 2);
             SetVBlankCallback(VBlankCB);
             SetMainCallback2(CB2_TitleScreenRun);
-            m4aSongNumStart(BGM_FRLG_TITLE);
+            m4aSongNumStart(MUS_TITLE);
         }
         return;
     }