[Qt6.4] Fix one more char* to QVariant issue

src/timeline2/model/trackmodel.cpp

@@ -917,7 +917,7 @@ int TrackModel::getRowfromComposition(int tid) const
 QVariant TrackModel::getProperty(const QString &name) const
 {
     READ_LOCK();
-    return QVariant(m_track->get(name.toUtf8().constData()));
+    return QString(m_track->get(name.toUtf8().constData()));
 }
 
 void TrackModel::setProperty(const QString &name, const QString &value)