Fixes double rel attr

Author: Keith Daulton

index.html

@@ -19,7 +19,7 @@
                 <li class="c-menu__item"><a class="c-button c-menu__link" href="#experience">Experience</a></li>
                 <!-- <li class="c-menu__item"><a class="c-menu__link" href="#skunkworks">Skunkworks</a></li> -->
                 <li class="c-menu__item"><a class="c-button c-menu__link" href="#contact">Contact</a></li>
-                <li class="c-menu__item"><a class="c-button c-menu__link" rel="external" rel="noopener" target="_blank" href="https://github.com/d13/d13.github.io">Code</a></li>
+                <li class="c-menu__item"><a class="c-button c-menu__link" rel="noopener" target="_blank" href="https://github.com/d13/d13.github.io">Code</a></li>
             </ul>
         </nav>
     </header>