fcitx5-configtool 5.1.9 for a Qt 6.9 incompatible change

[Weng Xuetian]

Hi all,
There seems to be a breaking change in Qt 6.9 that changes some QML
behavior. This breaks the basic functionality in the KCM version of
the config tool.

This urgent release is intended to fix this issue. Any distro decided
to upgrade to Qt 6.9 should upgrade this version, there's no
dependency change.

Meanwhile for KDE/Plasma users, you may also use fcitx5-config-qt as a
workaround.

Sorry for the inconvenience.

Thanks!