Addons developer docs page: broken link for inject css/js

[Megalomaniak]

Under Addon Definition section after the paragraph there is a list of things an addon can contain. First of them is item named A Plugin and it features a sublist of things a plugin can do.

One of the items is a link titled inject css/js which links to following(broken) url:
https://docs.vanillaforums.com/developer/addons/css-and-javascript
taking the reader to a 404 error page.