Navigation API demo backlink wrong?

[fry69]

This link here: https://github.com/mdn/dom-examples/blob/main/navigation-api/subpage.html#L23 brings you to a non-existent page:

      <p><a href="/navigation-api/">Back to index.html</a>.</p>

What exists is https://mdn.github.io/dom-examples/navigation-api/ so should this link be:

      <p><a href="/dom-examples/navigation-api/">Back to index.html</a>.</p>

Or does the Navigations API does have kind of relative link semantics I do not understand?

This currently breaks in Firefox Nightly (today's version) and Chrome (stable).