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/plugins/qmljseditor/qmljsautocompleter.cpp

@@ -121,7 +121,7 @@ static bool shouldInsertNewline(const QTextCursor &tc)
     return false;
 }
 
-static bool isCompleteStringLiteral(const QStringView &text)
+static bool isCompleteStringLiteral(QStringView text)
 {
     if (text.length() < 2)
         return false;