Good point. @DigitalStartup if you can wait and update Discourse later today or tomorrow, I’ve just added a plugin outlet (FEATURE: Add about-after-description plugin outlet · discourse/discourse@5cf63e4 · GitHub) that will simplify adding content (and make it more future-proof).
You’ll instead add this to </head>
<script type="text/x-handlebars" data-template-name="/connectors/about-after-description/custom-about">
Custom HTML here
</script>