x11-wm/lxqt: Update to 2.3.0

- Update x11/screengrab to 3.1.0
- Update editors/featherpad to 1.6.2
- Add xdg-desktop-portal like RUN_DEPENDS to xdg-desktop-portal-lxqt [1]

ChangeLog at:   https://lxqt-project.org/release/2025/11/05/release-lxqt-2-3-0/
With hat:       lxqt
PR:		290488
Reported by:	Siva Mahadevan <me at svmhdvn.name> [1]