docs: Add new id3v23 config option to convert plugin documentation
docs: Add new id3v23 config option to convert plugin documentation

ibmibmibm/beets,sampsyo/beets,SusannaMaria/beets,jackwilsdon/beets,beetbox/beets,ibmibmibm/beets,beetbox/beets,sampsyo/beets,ibmibmibm/beets,beetbox/beets,shamangeorge/beets,SusannaMaria/beets,SusannaMaria/beets,sampsyo/beets,shamangeorge/beets,shamangeorge/beets,jackwilsdon/beets,jackwilsdon/beets,beetbox/beets,SusannaMaria/beets,ibmibmibm/beets,jackwilsdon/beets,shamangeorge/beets,sampsyo/beets