Fix incorrect table of contents

Author: xfq

pages/languagedev_participation.html

@@ -56,7 +56,7 @@ <h1>Get involved with Language Enablement</h1>
 
 
 <section id="sidebarExtras">
-<h2 style="margin-inline-end: 1rem;">Group home pages</h2>
+<h2 class="notoc" style="margin-inline-end: 1rem;">Group home pages</h2>
 <ul style="list-style-type: none; margin-inline: 1rem;">
 <li style="margin-inline-start: 0;"><a href="https://w3c.github.io/afrlreq/home">African languages (afrlreq)</a></li>
 <li style="margin-inline-start: 0;"><a href="https://w3c.github.io/amlreq/home">American languages (amlreq)</a></li>