Fix #3233 -- Simple theme classless semantic HTML

pelican/themes/simple/templates/authors.html

@@ -3,7 +3,7 @@
 {% block title %}{{ SITENAME|striptags }} - Authors{% endblock %}
 
 {% block content %}
-    <h1>Authors on {{ SITENAME }}</h1>
+    <h2>Authors on {{ SITENAME }}</h2>
     <ul>
     {% for author, articles in authors|sort %}
         <li><a href="{{ SITEURL }}/{{ author.url }}">{{ author }}</a> ({{ articles|count }})</li>