Update README

Yuhang Zhao

2024-05-28 79c0602a1f0d80e5babe5f0f0b514189b6823540

 examples/mainwindow/mainwindow.cpp

@@ -60,8 +60,7 @@
    setWindowTitle(tr("Example MainWindow"));
    resize(800, 600);

    setFixedHeight(600);

    // setFixedHeight(600);
    // windowAgent->centralize();
}