Configuring HTML template for footnotes

I’m using blackfriday’s support for footnotes:

Hello. [^1]

[^1]: This is a footnote.

This renders roughly as:

<p>
  Hello.
  <sup><a href="#fn:1">1</a>
</p>

<hr/>
<div class="footnotes">
  <ol>
    <li id="fn:1">This is a footnote.</li>
  </ol>
</div>

All good.

However I would like to customize this template. For example, instead of <hr/> I would love to just add a small <p class="strong">Footnotes</p> title.

I’d look at https://gohugo.io/content-management/formats/#blackfriday-options and see if there’s an option there. Doesn’t look like it.