x11-servers/xwayland: Update to 23.2.6

Release notes: https://lists.x.org/archives/xorg-announce/2024-April/003503.html

Differential Revision: https://reviews.freebsd.org/D44695
Reviewed by: bapt
Sponsored by: Beckhoff Automation GmbH & Co. KG

(cherry picked from commit ead797a07f8a385f609a653e9f34343ec9b12d04)