www/tgpt: Update 2.11.1 => 2.12.0
Changelog:
https://github.com/aandrew-me/tgpt/releases/tag/v2.12.0
Reported by: portscout
Approved by: osa, vvd (Mentors, implicit)
MFH: 2026Q3
(cherry picked from commit 1fe02cc8d199e5e78924336786b7d22c9116b86d)