Build QMenuBar test without warning

Adapt to changes in QWidget::addAction API from 08e4d2db084f6abbf1840ff.

Pick-to: 6.3
Change-Id: If6e05b47de88cf55070238f08b96586b855cc5c1
Reviewed-by: Marc Mutz <marc.mutz@qt.io>

tests/auto/widgets/widgets/qmenubar/tst_qmenubar.cpp

@@ -1432,7 +1432,7 @@ void tst_QMenuBar::taskQTBUG4965_escapeEaten()
     QMenu menu("menu1");
     QAction *first = menubar.addMenu(&menu);
 #if QT_CONFIG(shortcut)
-    menu.addAction("quit", &menubar, SLOT(close()), QKeySequence("ESC"));
+    menu.addAction("quit", QKeySequence("ESC"), &menubar, SLOT(close()));
 #endif
     centerOnScreen(&menubar);
     menubar.show();