Fix typo

Author: chris-barry

index.html

@@ -35,7 +35,7 @@ <h2>
         <h2>
           <a class="post-link" href="https://github.com/gitbucket/gitbucket-gist-plugin"><span class="fa fa-file-code-o"></span>Gist plugin</a>
         </h2>
-          <p>Add code snippet Gist like functionnality to gitbucket</p>
+          <p>Add code snippet Gist like functionality to gitbucket</p>
       </li>
       <li>
         <h2>