audio/audacity: Update to 3.1.1

Hotfix release [1]:

• Fixed FFMPEG imports only importing the left channel
• Improved Audacity's performance when many clips are present
• Fixed a crash with detach at silences
• Fixed clip name corruption when applying effects to adjacent clips
• Fixed a crash with the time shift commands
• Fixed custom themes not working

[1] https://github.com/audacity/audacity/releases/tag/Audacity-3.1.1

PR: 259812