Update to the latest choco-theme

[st3phhays]

Description Of Changes

This updates to the latest choco-theme. No significant changes have been made that would affect the functionality of this website.

Motivation and Context

Choco-theme is outdated and it would be good to have it the same as the other websites so it doesn't get too far behind.

Testing

• I have previewed these changes using the Docker Container or another method before submitting this pull request.

Change Types Made

• Minor documentation fix (typos etc.).
• Major documentation change (refactoring, reformatting or adding documentation to existing page).
• New documentation page added.
• The change I have made should have a video added, and I have raised an issue for this.

Change Checklist

• Requires a change to menu structure (top or left hand side)/
• Menu structure has been updated

Related Issue

n/a

[pauby]

@st3phhays awesome work! Thanks for your contribution!

@corbob Thanks for reviewing and approving the PR.