docs: Update table of contents and other navigation

Author: adamwathan

packages/@headlessui-react/README.md

@@ -29,16 +29,15 @@ _This project is still in early development. New components will be added regula
 
 - [Transition](#transition)
 - [Menu Button (Dropdown)](#menu-button-dropdown)
-- [Listbox](#listbox)
+- [Listbox (Select)](#listbox)
+- [Switch (Toggle)](#switch-toggle)
 
 ### Roadmap
 
 This project is still in early development, but the plan is to build out all of the primitives we need to provide interactive React examples of all of the components included in [Tailwind UI](https://tailwindui.com), the commercial component directory that helps us fund the development of our open-source work like [Tailwind CSS](https://tailwindcss.com).
 
 This includes things like:
 
-- Listboxes
-- Toggles
 - Modals
 - Tabs
 - Slide-overs
@@ -763,7 +762,7 @@ function MyDropdown() {
 | `active`   | Boolean | Whether or not the item is the active/focused item in the list.                    |
 | `disabled` | Boolean | Whether or not the item is the disabled for keyboard navigation and ARIA purposes. |
 
-## Listbox
+## Listbox (Select)
 
 [View live demo on CodeSandbox](https://codesandbox.io/s/headlessuireact-listbox-example-57eoj?file=/src/App.js)
 
@@ -1254,7 +1253,7 @@ function MyListbox() {
 The `Switch` component and related child components are used to quickly build custom switch/toggle components that are fully accessible out of the box, including correct ARIA attribute management and robust keyboard support.
 
 - [Basic example](#basic-example-3)
-- [Using a custom label](#using-a-custom-label)
+- [Using a custom label](#using-a-custom-label-1)
 - [Component API](#component-api-3)
 
 ### Basic example

packages/@headlessui-vue/README.md

@@ -30,16 +30,15 @@ yarn add @headlessui/vue
 _This project is still in early development. New components will be added regularly over the coming months._
 
 - [Menu Button (Dropdown)](#menu-button-dropdown)
-- [Listbox](#listbox)
+- [Listbox (Select)](#listbox-select)
+- [Switch (Toggle)](#switch-toggle)
 
 ### Roadmap
 
 This project is still in early development, but the plan is to build out all of the primitives we need to provide interactive Vue examples of all of the components included in [Tailwind UI](https://tailwindui.com), the commercial component directory that helps us fund the development of our open-source work like [Tailwind CSS](https://tailwindcss.com).
 
 This includes things like:
 
-- Listboxes
-- Toggles
 - Modals
 - Tabs
 - Slide-overs
@@ -374,7 +373,7 @@ To tell an element to render its children directly with no wrapper element, use
 | `active`   | Boolean | Whether or not the item is the active/focused item in the list.                    |
 | `disabled` | Boolean | Whether or not the item is the disabled for keyboard navigation and ARIA purposes. |
 
-## Listbox
+## Listbox (Select)
 
 [View live demo on CodeSandbox](https://codesandbox.io/s/headlessuivue-listbox-example-mi67g?file=/src/App.vue)
 
@@ -1044,9 +1043,9 @@ export default {
 
 The `Switch` component and related child components are used to quickly build custom switch/toggle components that are fully accessible out of the box, including correct ARIA attribute management and robust keyboard support.
 
-- [Basic example](#basic-example-3)
-- [Using a custom label](#using-a-custom-label)
-- [Component API](#component-api-3)
+- [Basic example](#basic-example-2)
+- [Using a custom label](#using-a-custom-label-1)
+- [Component API](#component-api-2)
 
 ### Basic example