Port deprecated QProcess::startDetached(QString) method

shell/softwarerendernotifier.cpp

@@ -32,7 +32,7 @@ SoftwareRendererNotifier::SoftwareRendererNotifier(QObject *parent)
     setStandardActionsEnabled(false);
 
     connect(this, &KStatusNotifierItem::activateRequested, this, []() {
-        QProcess::startDetached("kcmshell5 qtquicksettings");
+        QProcess::startDetached(QStringLiteral("kcmshell5"), {QStringLiteral("qtquicksettings")});
     });
 
     auto menu = new QMenu; //ownership is transferred in setContextMenu