[DEVIALET DIONE] - Release notes - DOS 2.20.0

[DEVIALET DIONE] - Release notes - DOS 2.20.0

This release requires Devialet app 1.26.1 or newer. It includes the following improvements compared to DOS 2.18.6:
- Enhanced HDMI reliability, stability, robustness and compatibility.
- Optimized user experience for users in China.
- Enhanced network connectivity and stability.
- Enhanced Bluetooth connectivity and stability.
- Press the Play/Pause button three times to go to the previous track.
- Other bug fixes and improvements.