Revamp bindable subscription example

Silence a bogus warning.

Pick-to: 6.6 6.5
Task-number: QTBUG-114689
Change-Id: I7267b752e780b0c48cc57a513d12ad504e4c7a30
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

examples/corelib/bindableproperties/bindablesubscription/main.cpp

@@ -23,6 +23,8 @@ int main(int argc, char *argv[])
     BindableSubscription subscription(&user);
 
     SubscriptionWindow w;
+    // clazy:excludeall=lambda-in-connect
+    // when subscription is out of scope so is window
 
     // Initialize subscription data
     QRadioButton *monthly = w.findChild<QRadioButton *>("btnMonthly");