QNetworkInfo[win]: Advertise Metered feature

I forgot to add this to the features list when adding support for it.

Amends d2c5494c3d

Pick-to: 6.6 6.5
Fixes: QTBUG-118741
Change-Id: Ieabf086ef66777e6178476934b88448ad88bc738
Reviewed-by: Erik Verbruggen <erik.verbruggen@me.com>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

src/plugins/networkinformation/networklistmanager/qnetworklistmanagernetworkinformationbackend.cpp

@@ -72,6 +72,7 @@ public:
                                              | QNetworkInformation::Feature::CaptivePortal
 #if QT_CONFIG(cpp_winrt)
                                              | QNetworkInformation::Feature::TransportMedium
+                                             | QNetworkInformation::Feature::Metered
 #endif
                                              );
     }