Update post_footer.html

docs/_includes/post_footer.html

@@ -2,6 +2,6 @@
   <!-- <img src="{{ site.baseurl }}/images/me.jpeg" alt="John Otander" class="avatar" /> -->
 
   <p>
-    Follow Apereo on <a href="https://twitter.com/{{ site.twitter_username }}">Twitter</a>.
+    Follow  on <a href="https://twitter.com/{{ site.twitter_username }}">Twitter</a>.
   </p>
 </div>