www/vultr-cli: Update 2.17.0 => 3.6.0
Changelog:
https://github.com/vultr/vultr-cli/blob/v3.6.0/CHANGELOG.md
PR: 288616
Reported by: Mike Andrews <mandrews@bit0.com>
Tested by: Mike Andrews <mandrews@bit0.com>
Approved by: Antranig Vartanian <antranigv@freebsd.am>
(maintainer, timeout > 2 weeks)
Approved by: yuri@ (Mentor)