textproc/fcitx5-qt: Bump PORTREVISION for Qt 6.11.1 update (direct commit)

fcitx5-qt links against the Qt private API and must be rebuilt with
every Qt update, but it was missed when Qt was updated to 6.11.1 in this
branch. Since the package version did not change, users upgrading from
2026Q2 keep the package built against Qt 6.10.2, which can crash any Qt6
application loading the input context plugin.

The port has been added to the list of Qt private API consumers at
https://wiki.freebsd.org/KDE/Qt

PR: 297617
Reported by: Juhani Krekelä <juhani@krekela.fi>
Approved by: portmgr (implicitly)