`<input type="checkbox">` does not render.

[RokeJulianLockhart]

As an example, at https://github.com/webcompat/web-bugs/issues/140018#issue-2451036767 I have:

<ol>
    <li> <input type="checkbox"> Desktop site instead of mobile site </li>
    <li> <input type="checkbox"> Mobile site is not usable </li>
    <li> <input type="checkbox"> Video doesn't play </li>
    <li> <input type="checkbox"> Layout is messed up </li>
    <li> <input type="checkbox"> Text is not visible </li>
    <li> <input type="checkbox" checked> Something else <!-- (Add details below) --> </li>
    <li>
        <h4> <b> Something else <!-- (Add details below) --> </b> </h4>
        When I authenticate with <a href="https://login.gaijin.net/en">https://login.gaijin.net/en</a> to access <a href="https://support.gaijin.net/hc/requests/2601495">https://support.gaijin.net/hc/requests/2601495</a>, I see what is depicted in the undermentioned screenshot.
    </li>
</ol>

...which renders as:

1. Desktop site instead of mobile site
2. Mobile site is not usable
3. Video doesn't play
4. Layout is messed up
5. Text is not visible
6. Something else

7. Something else

   When I authenticate with https://login.gaijin.net/en to access https://support.gaijin.net/hc/requests/2601495, I see what is depicted in the undermentioned screenshot.

[github-actions[bot]]

Stale issue message

[RokeJulianLockhart]

https://github.com/github/markup/issues/1853#issuecomment-2395415740

@GitHub-Actions, reopen this!

https://github.com/github/markup/issues/1853#event-14619483323

It's certainly not completed.