devel/qt5-scripttools: Restore PORTREVISION

I forgot to update this port in c0294e30df31 where PORTVERSION was
increased in Mk/Uses/qt.mk, but distinfo was not updated and the old
PORTREVISION was not removed, but it had unfortunately already been
indexed by the chkversion.pl script with the old PORTREVISION in tow
before I fixed it in 886b4294b79c. The port was broken before this
and no packages would have been created. This is just to squash the
nag emails to the kde@ list.

MFH: 2024Q4
(cherry picked from commit cc183d8a8d82261baf32888861abffae1769d02d)