Fixed the Portfolio link on the Contact Page

Author: mryoho

contact.html

@@ -75,7 +75,7 @@
                 <li><a href="./index.html">Home</a></li>
                 <li><a href="./contact.html" class="active">Contact</a></a></li>
                 <li><a href="">About</a></li>
-                <li><a href="">Portfolio</a></li>
+                <li><a href="portfolio.html">Portfolio</a></li>
                 <li><a href="">Social Media</a></li>
                 <li><a href="./blog.html">Blog</a></li>
             </ul>