Update host server for .co domains

[jp-moller]

The server for .co domains has recently been updated from whois.nic.co to whois.registry.co

whois -h whois.iana.org co

% IANA WHOIS server
% for more information on IANA, visit http://www.iana.org
% This query returned 1 object

domain:       CO

<contact details removed>

whois:        whois.registry.co

status:       ACTIVE
remarks:      Registration information: http://www.registry.co

created:      1991-12-24
changed:      2025-10-08
source:       IANA

This is the output for whois command when the old server is still used

whois -h whois.nic.co siphost.co
getaddrinfo(whois.nic.co): Name or service not known