Limit ToC depth

Author: csswizardry

_layouts/post.html

@@ -26,7 +26,7 @@ <h1 itemprop="name  headline" elementtiming=page-title style="view-transition-na
         {% if page.toc != false %}
           <details class=c-toc>
             <summary>Table of Contents</summary>
-            {% include toc.html html=content ordered=true %}
+            {% include toc.html html=content ordered=true h_max=3 %}
           </details>
         {% endif %}