Update README.md

Update debian version.

Author: dtcooper

README.md

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 [<img src="https://raw.githubusercontent.com/dtcooper/raspotify/master/raspotify.svg?sanitize=true">](https://github.com/dtcooper/raspotify)
 
-Raspotify is a [Debian package and associated repository](https://en.wikipedia.org/wiki/Deb_(file_format)) for [Debian Stable](https://www.debian.org/releases/stable/) ( ***Currently Debian 11 "Bullseye"*** ) and other Debian Stable based/compatible OS's ( ***your mileage may vary*** ) which thinly wraps the awesome [librespot](https://github.com/librespot-org/librespot) library by [Paul Lietar](https://github.com/plietar) and others up as a [systemd](https://en.wikipedia.org/wiki/Systemd) [daemon](https://en.wikipedia.org/wiki/Daemon_(computing)).
+Raspotify is a [Debian package and associated repository](https://en.wikipedia.org/wiki/Deb_(file_format)) for [Debian Stable](https://www.debian.org/releases/stable/) ( ***Currently Debian 13 "Bookworm"*** ) and other Debian Stable based/compatible OS's ( ***your mileage may vary*** ) which thinly wraps the awesome [librespot](https://github.com/librespot-org/librespot) library by [Paul Lietar](https://github.com/plietar) and others up as a [systemd](https://en.wikipedia.org/wiki/Systemd) [daemon](https://en.wikipedia.org/wiki/Daemon_(computing)).
 
 Raspotify is intended to be used in a *[headless enviroment](https://en.wikipedia.org/wiki/Headless_computer)*. For desktop OS's [spotifyd](https://github.com/Spotifyd/spotifyd) offers similar functionality and is a better choice. If you're looking for a turnkey audio solution for Raspberry Pi's with Spotify Connect support we recommend [moOde™ audio player](https://moodeaudio.org/).