Canvas Style Incorrectly Styles Non-LMS Pages

### Is there an existing issue outlining your problem?

- [x] I am using the latest version of the userstyle.
- [x] I have searched the existing issues and they do not solve my problem.

### What userstyles are you seeing the problem on?

lbl:canvas-lms

### Describe your problem.

Both the old and the new Canvas documentation pages are highlighted incorrectly as seen at https://canvas.instructure.com/doc/api/index.html and https://developerdocs.instructure.com/services/canvas, the new docs use GitBook, the old docs appear to use their own system at first glance.

### Attach screenshots.

Old Docs:

New Docs:

### What browser(s) are you seeing the problem on?

Zen Browser 1.16.4b (Firefox 143.0.4)

### Any additional comments?

_No response_

Start by opening the lbl:canvas-lms userstyle and comparing its selectors with the old and new Canvas documentation URLs. It is done when those documentation pages are no longer highlighted incorrectly while Canvas LMS pages retain their intended styling; verify the result in Zen Browser or Firefox.

Written by the indexing model from the issue text.