Bump kernel to the latest 6.6 version

Bump to latest version

Bump to latest version

Bump

Add Digi2 UUIDs

Update documentation to replace vollibrespot with spotifyd (hifiberry…

…#504)

* Change spotifyd to vollibrespot in doc/services.md

HifiberryOS now uses spotifyd instead of vollibrespot. This
commit updates the documentation to reflect this.

* Replace spotifyd with vollibrespot in README.md

* Update dbus and mpris docs to clarify that spotifyd is non-default

remove old release

Use official 2023-11 release

Merge branch 'development' of https://github.com/hifiberry/hifiberry-os…

… into development

Merge pull request hifiberry#425 from hifiberry/development

Release 20230223