add usage that pass setup function to defineComponent

[unbyte]

No description provided.

[NataliaTepluhina]

nitpick: could we change the syntax here to ES6?

Suggested change

	const HelloWorld = defineComponent(function HelloWorld() {
	const HelloWorld = defineComponent(HelloWorld() => {

[unbyte]

However, it's not a valid js(ts) syntax 😂. function is used to keep the document concise, because if use arrow function, code in document should be like

const HelloWorld = () => {
    ....
}

// since `HelloWorld` is already defined in the scope, use `HelloWorldComponent` instead
const HelloWorldComponent = defineComponent(HelloWorld)

[NataliaTepluhina]

Sorry, I didn't pay enough attention when was writing the suggestion 🤦🏻 You're right