Update url regex to match usercss

[xt0rted]

Wanted to PR this because I'm wondering how the other @-moz-document elements should be handled now. The script seems to remove the main one and uses this @include in its place, but what about the others?

[Mottie]

Hi @xt0rted!

What is https://launch-editor.github.com/? I get a 404 page; a bright white 404 page.

And the resources pages will need a bit of styling work as well.

[xt0rted]

That's the Github Actions editor. You might be able to see it here but I'm not sure if the UI shows for users not in the beta.

[silverwind]

Ideally, the @include options here should include regexes for all sections we have in the CSS version. @include can be specified multiple times, so it should be pretty easy to fix.