Replace @next references

Author: adamwathan

docs/pages/index.mdx

@@ -34,10 +34,10 @@ Install the plugin using npm or Yarn:
 
 ```bash
 # Using npm
-npm install @tailwindcss/custom-forms@next --save-dev
+npm install @tailwindcss/custom-forms --save-dev
 
 # Using Yarn
-yarn add @tailwindcss/custom-forms@next -D
+yarn add @tailwindcss/custom-forms -D
 ```
 
 ### 2. Add the plugin to your `tailwind.config.js` file
@@ -427,7 +427,7 @@ module.exports = {
 The configuration format is the same [CSS-in-JS syntax](https://tailwindcss.com/docs/plugins/#css-in-js-syntax)
 used to author Tailwind plugins, so you are free to customize or add any CSS properties you like.
 
-See [the default options](#) used by the plugin for a complete reference of styles that are applied
+See [the default options](https://github.com/tailwindcss/custom-forms/blob/master/src/defaultOptions.js) used by the plugin for a complete reference of styles that are applied
 out of the box.
 
 ### Customizing the select, checkbox, and radio icons