Fix emphasised folders (MarkDown)

[MoPaMo]

Dear ml5 community,

I'm making a Pull Request(PR). Please see the details below.

A good PR 🌟

→ Step 1: Describe your Pull Request 📝

Fixing a Bug? Adding an Update? Submitting a New Feature? Does it introduce a breaking change?

For some reason, markdown doesn’t render /text as bold so the folders aren’t rendered*.
Instead, I put the slash behind the name of the folder

A great PR 🌟🌟

→ Step 2: Share a Relevant Example 🦄

Here's some example code or a demonstration of my feature as a part of this pull request, a separate pull request, in the https://editor.p5js.org, or codepen/jsfiddle/etc...

Here’s a screenshot of the docs, not rendering it (GitHub does):

The best PR 🌟🌟🌟

→ Step 3: Screenshots or Relevant Documentation 🖼

Here's some helpful screenshots and/or documentation of the new feature

[bomanimc]

Thanks! Just noticed the PR here!