update demo code

Zhao Yuhang

2024-09-15 f645ae48cda10b80ffe9d83ba9487671c7f535c0

 examples/qml/QWKButton.qml

@@ -20,6 +20,7 @@
            mipmap: true
            width: 12
            height: 12
            fillMode: Image.PreserveAspectFit
        }
    }
    background: Rectangle {