Audio player improvements and bug fixes.

## What's Changed
* feat: Rename fastlane images to sequential numbers for F-Droid by @Adithya-Jayan in https://github.com/Adithya-Jayan/MyRepertoirApp/pull/158
* Fix/GitHub actions by @Adithya-Jayan in https://github.com/Adithya-Jayan/MyRepertoirApp/pull/163
* Fix/audio player by @Adithya-Jayan in https://github.com/Adithya-Jayan/MyRepertoirApp/pull/164


**Full Changelog**: https://github.com/Adithya-Jayan/MyRepertoirApp/compare/v4.1.0+17...v4.2.0+18
