Update Qt 5.15 again (or at least qttranslations)

Hi guys,

Can you update the Qt 5.15 from KDE again?

With the Qt from KDE pt_BR become a shipped language but I discover 2
mistakes which make the translation unusable

With this MR [0] I fix it (on Qt for all branches and in KDE' Qt 5.15). So
can you update just the qttranslation module to a recent git version?

Regards,

Luiz

[0] https://invent.kde.org/qt/qt/qttranslations/-/merge_requests/2