[denonmarantz] Some clean up and alignment with the template of the README (#6029)
[denonmarantz] Some clean up and alignment with the template of the README (#6029)

Signed-off-by: Kai Kreuzer <31ea678c44dc4e8e22ccfd165592dd71a30e46ae@openhab.org>
Snickermicker/openhab2,Snickermicker/openhab2,Snickermicker/openhab2,Snickermicker/openhab2