ardour: update to 5.12.
ardour: update to 5.12.

Closes: #11291 [via git-merge-pr]

NeoChontrix/void-packages,necrophcodr/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,coredumb/void-packages,necrophcodr/void-packages,NeoChontrix/void-packages,coredumb/void-packages,coredumb/void-packages,necrophcodr/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,coredumb/void-packages,coredumb/void-packages,coredumb/void-packages