message: update code example for useFieldArray
diff: @@ -8,8 +8,12 @@ export default `function Test() {
  return (
  {fields.map((field, index) => (
  - {/* important: make sure supply key and defaultValue for your inputs */}
  - <input key={field.id} name={\`test[\${index}].value\`} ref={register()} defaultValue={field.value} />
  + <input
  + key={field.id} // important to include key with field's id
  + name={\`test[\${index}].value\`}
  + ref={register()} // register() when there is no validation rules
  + defaultValue={field.value} // make sure to include defaultValue
  + />
  ))}
  );
  }
  