Do not pass QStringView by const reference

That's what the documentation says:

  https://doc.qt.io/qt-6/qstringview.html#details

Change-Id: I0b41fc4abad1601c0ed416a505534cf7ae7633e1
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/qmljs/parser/qmldirparser.cpp

@@ -33,7 +33,7 @@ QT_QML_BEGIN_NAMESPACE
 
 using namespace LanguageUtils;
 
-static int parseInt(const QStringView &str, bool *ok)
+static int parseInt(QStringView str, bool *ok)
 {
     int pos = 0;
     int number = 0;