app/themes/hugo-theme-stack/layouts/partials/article/components/content.html

<section class="article-content">
    <!-- Refer to https://discourse.gohugo.io/t/responsive-tables-in-markdown/10639/5 -->
    {{ $wrappedTable := printf "<div class=\"table-wrapper\">${1}</div>" }}
    {{ .Content | replaceRE "(<table>(?:.|\n)+?</table>)" $wrappedTable | safeHTML }}
</section>