Document about using v-model in jsx seems causing misunderstandings and outdated

[s3xysteak]

In [Render Functions & JSX](https://vuejs.org/guide/extras/render-function), the doc said:

The v-model directive is expanded to modelValue and onUpdate:modelValue props during template compilation—we will have to provide these props ourselves

It looks no problem here, but it causing misunderstandings. The other chapter before points out that the usage of the h() function and JSX is similar. However, in this chapter, only the usage of the h() function is mentioned, so I mistakenly thought that JSX must also be used in the same way. But I discovered that using v-model in jsx also works fine.

const val = ref('hello world')
console.log(<Com v-model={val.value} />)

You will see that in props:

modelValue:  'hello world'
onUpdate:modelValue:  $event => val.value = $event