Update using-plugins.md

website/docs/using-plugins.md

@@ -84,9 +84,14 @@ A plugin is a module which exports a function that takes two parameters and retu
 
 The exported modules for plugins are called with two parameters: `context` and `options` and returns a JavaScript object with defining the [lifecycle APIs](./lifecycle-apis.md).
 
-For example if you have a reference to a local folder such as this in your docusaurus.config.js:
+For example if you have a reference to a local folder such as this in your `docusaurus.config.js`:
 
-    plugins: [path.resolve(__dirname, 'my-plugin')],
+```js title="docusaurus.config.js"
+module.exports = {
+  // ...
+  plugins: [path.resolve(__dirname, 'my-plugin')],
+};
+```
 
 Then in the folder `my-plugin` you can create an index.js such as this