Add 'Data' link to navigation bar in research.html

Author: jkkay

research.html

@@ -18,6 +18,7 @@
                         <li class="nav-item"><a class="nav-link" href="index.html">Home</a></li>
                         <li class="nav-item"><a class="nav-link" href="CV.html">CV</a></li>
                         <li class="nav-item"><a class="nav-link active" aria-current="page" href="research.html">Research</a></li>
+                        <li class="nav-item"><a class="nav-link" href="data.html">Data</a></li>
                         <li class="nav-item"><a class="nav-link" href="contact.html">Contact</a></li>
                     </ul>
                 </div>