Fix save device unmounting on exit

- Properly unmount save device before application exit
- Prevents potential file system issues
- Ensures clean shutdown process

source/main.c

@@ -35,6 +35,8 @@ int main(int argc, char **argv)
         consoleUpdate(NULL);
     }
     
+    // Unmount save data before exit
+    fsdevUnmountDevice("save");
     consoleExit(NULL);
     return 0;
 }