a11y atspi: Fix incorrect use of x instead of y position

Fixes: QTBUG-105031
Pick-to: 6.4 6.3 6.2
Change-Id: I26fcbfbd5a90982b87dda89b2880efe937f099d8
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

src/gui/accessible/linux/atspiadaptor.cpp

@@ -1545,7 +1545,7 @@ static QRect getRelativeRect(QAccessibleInterface *interface)
         wr = window->rect();
 
         cr.setX(cr.x() - wr.x());
-        cr.setY(cr.x() - wr.y());
+        cr.setY(cr.y() - wr.y());
     }
     return cr;
 }