pk: Have the notifier listen to the correct for offline events

We need to know when the offline update has been triggered, We were
listening to the wrong object though and it was erratic. Now it will be
checking the triggered value correctly.

libdiscover/backends/PackageKitBackend/PackageKitNotifier.cpp

@@ -34,7 +34,7 @@ PackageKitNotifier::PackageKitNotifier(QObject* parent)
     connect(PackageKit::Daemon::global(), &PackageKit::Daemon::updatesChanged, this, &PackageKitNotifier::recheckSystemUpdateNeeded);
     connect(PackageKit::Daemon::global(), &PackageKit::Daemon::transactionListChanged, this, &PackageKitNotifier::transactionListChanged);
     connect(PackageKit::Daemon::global(), &PackageKit::Daemon::restartScheduled, this, &PackageKitNotifier::nowNeedsReboot);
-    connect(PackageKit::Daemon::global(), &PackageKit::Daemon::changed, this, [this]{
+    connect(PackageKit::Daemon::global()->offline(), &PackageKit::Offline::changed, this, [this]{
         if (PackageKit::Daemon::global()->offline()->updateTriggered())
             nowNeedsReboot();
     });