Inline code snippets in reference do not have syntax highlighting

[davepagurek]

Most appropriate sections of the p5.js website?

Reference

What is your operating system?

Mac OS

Web browser and version

All

Actual Behavior

On pages like https://beta.p5js.org/reference/p5/for/ the code is all a single color, making it harder to read:

Expected Behavior

Something more like this:

Steps to reproduce

In a jsdoc description in the p5.js repo, include code like this:

```js
for (let i = 0; i < n; i++) {
   // something
}
```

Then build the reference of the p5.js-website

Would you like to work on the issue?

Yes

[davepagurek]

Fixed in #1065