textproc/qt5-xmlpatterns: unbreak after 020693c166d1

Project MESSAGE: perl -w /usr/local/lib/qt5/bin/syncqt.pl -module QtXmlPatterns -version 5.15.8 -outdir /wrkdirs/usr/ports/textproc/qt5-xmlpatterns/work/kde-qtxmlpatterns-5.15.8p0 -builddir /wrkdirs/usr/ports/textproc/qt5-xmlpatterns/work/kde-qtxmlpatterns-5.15.8p0 /wrkdirs/usr/ports/textproc/qt5-xmlpatterns/work/kde-qtxmlpatterns-5.15.8p0
sh: perl: not found

PR: 266007
Reported by: antoine (via exp-run)