added hackathon to navbar

Author: jooj99

_layouts/default.html

@@ -42,6 +42,9 @@
             <li class="nav-item item">
               <a class="nav-link text-primary" href="/projects">Projects</a>
             </li>
+            <li class="nav-item item">
+              <a class="nav-link text-primary" href="/hackathon">Hackathon</a>
+            </li>
           </ul>
           <button class="nav-item btn me-1 border border-0" id="modeButton">
             <h5><i class="bi bi-brightness-high-fill" style="vertical-align: -0.125em;"></i></h5>