Fix connect statement in terminal sample

This patch corrects the connect statement used to show the settings
dialog.

Change-Id: I6318e18f7a281d8ddb118ef1f1d2d18e86df9b22
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

examples/serialport/terminal/mainwindow.cpp

@@ -178,7 +178,7 @@ void MainWindow::initActionsConnections()
     connect(ui->actionConnect, &QAction::triggered, this, &MainWindow::openSerialPort);
     connect(ui->actionDisconnect, &QAction::triggered, this, &MainWindow::closeSerialPort);
     connect(ui->actionQuit, &QAction::triggered, this, &MainWindow::close);
-    connect(ui->actionConfigure, &QAction::triggered, settings, &MainWindow::show);
+    connect(ui->actionConfigure, &QAction::triggered, settings, &SettingsDialog::show);
     connect(ui->actionClear, &QAction::triggered, console, &Console::clear);
     connect(ui->actionAbout, &QAction::triggered, this, &MainWindow::about);
     connect(ui->actionAboutQt, &QAction::triggered, qApp, &QApplication::aboutQt);