qxkbcommon: map XKB_KEY_XF86Calculator to Qt::Key_Calculator

cfd935f removed the erroneous mapping
from XKB_KEY_XF86Calculator to Qt::Key_Launch1, leaving it unmapped.
It should be mapped to Qt::Key_Calculator, just like
XKB_KEY_XF86Calculater.

Fixes: QTBUG-121713
Pick-to: 6.6 6.5
Change-Id: Iaa28e38792f43a7950a3c38397869a6ffed332d1
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Liang Qi <liang.qi@qt.io>
(cherry picked from commit 86e9297)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/gui/platform/unix/qxkbcommon.cpp

@@ -300,6 +300,7 @@ static constexpr const auto KeyTbl = qMakeArray(
         Xkb2Qt<XKB_KEY_XF86Book,                Qt::Key_Book>,
         Xkb2Qt<XKB_KEY_XF86CD,                  Qt::Key_CD>,
         Xkb2Qt<XKB_KEY_XF86Calculater,          Qt::Key_Calculator>,
+        Xkb2Qt<XKB_KEY_XF86Calculator,          Qt::Key_Calculator>,
         Xkb2Qt<XKB_KEY_XF86Clear,               Qt::Key_Clear>,
         Xkb2Qt<XKB_KEY_XF86ClearGrab,           Qt::Key_ClearGrab>,
         Xkb2Qt<XKB_KEY_XF86Close,               Qt::Key_Close>,