Add Supysonic to Audio streaming section (#2835)

README.md

@@ -1141,6 +1141,7 @@ _See also: [List of streaming media systems - Wikipedia](https://en.wikipedia.or
 - [Raveberry](https://github.com/raveberry/raveberry) - A multi-user music server with a focus on participation. ([Demo](https://demo.raveberry.party/)) `LGPL-3.0` `Python`
 - [Snapcast](https://github.com/badaix/snapcast) - Synchronous multiroom audio server. `GPL-3.0` `C++`
 - [Stretto](https://github.com/benkaiser/stretto) - Music player with Youtube/Soundcloud import and iTunes/Spotify discovery. ([Demo](https://next.kaiserapps.com), [Clients](https://github.com/benkaiser/stretto-mobile-next)) `MIT` `Nodejs`
+- [Supysonic](https://github.com/spl0k/supysonic) - Python implementation of the Subsonic server API. `AGPL-3.0` `Python`
 - [Volumio](https://volumio.org/) - A free and open source linux distribution, designed and fine-tuned exclusively for music playback. ([Source Code](https://github.com/volumio/Volumio2)) `GPL-3.0` `Nodejs`
 - [ympd](https://www.ympd.org/) - Standalone MPD Web GUI written in C, utilizing Websockets and Bootstrap/JS. ([Source Code](https://github.com/notandy/ympd)) `GPL-2.0` `C`