docs: optimize version-box.js

[hedgar2017]

What ❔

This PR updates the version-box.js file to use more optimized JavaScript code.

Why ❔

This PR should make the overall execution of this file faster and more robust, improving the documentation in general.

Checklist

• PR title corresponds to the body of PR.
• [/] Tests for the changes have been added / updated.
• [/] Documentation comments have been added / updated.
• [/] Code has been formatted via cargo fmt and checked with cargo clippy.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.81%. Comparing base (b636f44) to head (2410b06).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #143   +/-   ##
=======================================
  Coverage   72.81%   72.81%           
=======================================
  Files          53       53           
  Lines        4381     4381           
=======================================
  Hits         3190     3190           
  Misses       1191     1191           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.