A minor cleanup - fix a comment

... so that it comments the actual code, not what this code was before.

Change-Id: Ib191b9d7bd3ae3cda39a15f0f711cb1dd3c5c2b7
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

tests/auto/network/kernel/qnetworkinterface/tst_qnetworkinterface.cpp

@@ -195,7 +195,7 @@ void tst_QNetworkInterface::localAddress()
 
     QHostAddress local = socket.localAddress();
 
-    // test that we can find the address that QTcpSocket reported
+    // test that we can find the address that QUdpSocket reported
     QList<QHostAddress> all = QNetworkInterface::allAddresses();
     QVERIFY(all.contains(local));
 }