Fix docs sidebar

[Jeremy-Walton]

Why?

The documentation content was not very responsive and often would get covered up by the sidebar.

What Changed

• Fix Table of Contents causing unresponsiveness
• Update Storybook to latest version
• Update some dev dependencies
• Update Github workflows to use latest Node version for builds

Sanity Check

• [ ] Have you updated any usage of changed tokens?
• [ ] Have you updated the docs with any component changes?
• [ ] Have you updated the dependency graph with any component changes?
• Have you run linters?
• Have you run prettier?
• Have you tried building the css?
• Have you tried building storybook?
• [ ] Do you need to update the package version?

Screenshots