www/phpvirtualbox-71: Update 7.1-1 => 7.1-2
Changelog:
https://github.com/phpvirtualbox/phpvirtualbox/blob/7.1-2/CHANGELOG.txt
https://github.com/phpvirtualbox/phpvirtualbox/releases/tag/7.1-2
Reported by: portscout
MFH: 2025Q4
(cherry picked from commit bcb56807ee1b6e861b4e9170ff9db3e262af57cb)