Add syntax highlighting guide in README.md

Author: arifszn

README.md

@@ -62,8 +62,8 @@ Creating a `example.md` in a sub folder will create a category in the sidebar.
 ```bash
 root
 ├── docs
-│	└── sub-folder
-│           └── example.md
+│   └── sub-folder
+│       └── example.md
 ```
 
 To change the category name or other category meta data, an optional file `_category_.json` can be created in the respective sub folder. More [here](https://docusaurus.io/docs/next/sidebar/autogenerated#autogenerated-sidebar-metadata).
@@ -86,6 +86,10 @@ Generate the variables from [here](https://docusaurus.io/docs/next/styling-layou
 
 Docusaurus uses [Prism React Renderer](https://github.com/FormidableLabs/prism-react-renderer) to highlight code blocks. All configuration are in the `prism` object of `docusaurus.config.js`. You can specify a custom theme from the [list of available themes](https://github.com/FormidableLabs/prism-react-renderer/tree/master/src/themes).
 
+### Syntax highlighting
+
+To add syntax highlighting for any of the other [Prism-supported languages](https://prismjs.com/#supported-languages), define it in an array of additional languages. More [here](https://docusaurus.io/docs/next/markdown-features/code-blocks#supported-languages).
+
 ### Change footer
 
 You can add logo and a copyright to the footer via `themeConfig.footer`. More [here](https://docusaurus.io/docs/next/api/themes/configuration#footer-1).