net-im/telegram-desktop: Update to 1.9.21
Latest ChangeLog:
https://github.com/telegramdesktop/tdesktop/releases/tag/v1.9.21
Accummulated changes from 1.9.14:
- Bug fixes and other minor improvements.
- Fix a possible crash in animated stickers rendering.
- Fix blurred thumbnails in albums with video files.
- Fix crash in shared links search.
- Improved spellchecking on Windows 7 and Linux.
- Mark new messages as read while scrolling down through them.
- Spell checker on Windows 7.
PR: 244900
Submitted by: henry.hu.sh@gmail.com (maintainer)