limit the TOC to H1 and H2

docs/index.html

@@ -103,7 +103,7 @@
       },
       toc: {
         scope: '.markdown-section',
-        headings: 'h1, h2, h3, h4, h5, h6',
+        headings: 'h1, h2',
         title: 'Table of Contents',
       },
       plugins: [