Examples for custom handle and track style are misleading

Hello 👋 ,
I really like the new docs, it's much more convenient than previous one.

Just noticed, that in slider examples the same implementation marked as old api, will be deprecated and The recommended new api at the same time.

https://slider.react-component.now.sh/demo/slider#slider

<div style={style}>
  <p>
    Slider with custom handle and track style.<strong>(old api, will be deprecated)</strong>
  </p>
  <Slider
    defaultValue={30}
    railStyle={{ backgroundColor: 'red', height: 10 }}
    trackStyle={{ backgroundColor: 'blue', height: 10 }}
    handleStyle={{
      borderColor: 'blue',
      height: 28,
      width: 28,
      marginLeft: -14,
      marginTop: -9,
      backgroundColor: 'black',
    }}
  />
</div>
<div style={style}>
  <p>
    Slider with custom handle and track style.<strong>(The recommended new api)</strong>
  </p>
  <Slider
    defaultValue={30}
    trackStyle={{ backgroundColor: 'blue', height: 10 }}
    handleStyle={{
      borderColor: 'blue',
      height: 28,
      width: 28,
      marginLeft: -14,
      marginTop: -9,
      backgroundColor: 'black',
    }}
    railStyle={{ backgroundColor: 'red', height: 10 }}
  />
</div>

Open the linked slider demo and inspect the custom handle and track style examples shown in the issue. Compare their labels and prop implementations; done means the examples no longer present the same implementation as both deprecated and recommended.