added MDN html5 link

Author: khan4019

areas/html.html

@@ -220,6 +220,10 @@ <h2>15. semantic</h2>
   <p>for example, &lt;b&gt;&lt;/b&gt; (for bold), and &lt;i&gt;&lt;/i&gt; (for italic) should never be used, because they&#x2019;re to do with formatting, not with the meaning or structure of the content. Instead, use the replacements &lt;strong&gt;&lt;/strong&gt; and &lt;em&gt;&lt;/em&gt; (meaning emphasis), which by default will turn text bold and italic (but don&#x2019;t have to do so in all browsers), while adding meaning to the structure of the content.</p>
   <p>ref: <a href="http://en.wikipedia.org/wiki/Semantic_HTML">Wiki: semantic HTML</a> </p>
 </div>
+<div>
+  <h2>Need more!</h2>
+  read: <a href="https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/HTML5?redirectlocale=en-US&redirectslug=HTML%2FHTML5">HTML5</a>
+</div>
 
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