update part of nested useState code example

Example 1: react hooks update nested object

<RadioButtonGroup
  onChange={(event) => { 
    setStyle(prevStyle => ({
        ...prevStyle,
        font: { ...prevStyle.font, align: event.target.value }
    }));
    console.log(style);
  }}
/>

Example 2: react hooks update nested object

const onChange = (event) => {
    const s = {...style};
    s.font.align = event.target.value;
    setStyle(s);
}