Disowning devel/plan9port

From: Felix Hanley <felix_at_userspace.com.au>
Date: Mon, 27 May 2024 01:05:11 UTC 
Hi all,

I am the current maintainer of devel/plan9port but I am unable to give
time to it at the moment so I will need to disown it. There is a current
bug meaning it fails to build in all environments.

My apologies for any inconvenience this may cause interested people.

Regards,
Felix