fix(docs): checkbox indeterminate example

[Scrum]

Incorrect example

<StyledCheckbox v-model:checked="checked">
    <Icon icon="radix-icons:checkbox-indicator">
      <Icon v-if="checked === 'indeterminate'" icon="radix-icons:divider-horizontal" />
      <Icon v-if="checked" icon="radix-icons:check" />
    </Icon>
  </StyledCheckbox>

change to

<CheckboxRoot v-model:checked="checked">
    <CheckboxIndicator>
      <Icon v-if="checked === 'indeterminate'" icon="radix-icons:divider-horizontal" />
      <Icon v-if="checked" icon="radix-icons:check" />
    </CheckboxIndicator>
  </CheckboxRoot>

[Scrum]

Input required and not supplied: apiToken I don't know what happened)

[zernonia]

Thanks for the PR @Scrum !