Axivion: Disconnect from Job's finished signal

Just to be sure we don't re-emit task's done signal.

Change-Id: Ibcd0076c2c14044355e838be2e6ba47d1019b9d1
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/axivion/credentialquery.cpp

@@ -44,6 +44,7 @@ void CredentialQueryTaskAdapter::start()
             task()->m_errorString = job->errorString();
         else if (reader && job->error() == NoError)
             task()->m_data = reader->binaryData();
+        disconnect(job, &Job::finished, this, nullptr);
         emit done(toDoneResult(success));
         m_guard.release()->deleteLater();
     });