Switch Qt 6 builds to use KF6
That isn't what we should be doing at this point yet, but the two consumers of this library also depend on PIM libraries which have done this switch already, so we don't really have a choice here anymore.
That isn't what we should be doing at this point yet, but the two consumers of this library also depend on PIM libraries which have done this switch already, so we don't really have a choice here anymore.