Fix h2

index.html

@@ -5,7 +5,7 @@
 {% assign currentdate = post.date | date: "%Y" %}
 {% if currentdate != date %}
 {% unless forloop.first %}</ul>{% endunless %}
-<h2 id="y{{post.date | date: "%Y"}}">{{ currentdate }}</h1>
+<h2 id="y{{post.date | date: "%Y"}}">{{ currentdate }}</h2>
 <ul>
     {% assign date = currentdate %}
     {% endif %}