Update Release Notes : "OTO-Mii for iOS" (Version 2.4.1)

What's New in Version 2.4.1:

1. The following function was added to achieve a universal design
　- "Pre-Sing" function of lyrics
　- Settings of character size of lyrics
　- Dark mode UI
　- Helpful information for VoiceOver
2. Some UI tweaks

Update to the latest version by clicking here.