www/sogo: Update to 5.12.2

- Fix porlint [1]
- Fix FLAVORS entry
- Add missing CONFLICT entries [1]

ChangeLog at:   https://www.sogo.nu/news/2025/sogo-v5122-released.html
PR:		287962
Reported by:	geoffroy desvernay <dgeo __at___ centrale-med.fr> [1]