adding the heading element using H2 element for the wireframe article

Author: Tobias-Amaechina

Wireframe/index.html

@@ -62,6 +62,7 @@ <h2>What is the Purpose of a Readme File?</h2>
     <footer>
       <p>
         This is the default, provided code and no changes have been made yet.
+        <h2> What is the Purpose of a Wireframe?</h2>
 
       </p>
     </footer>