Update header.html

Author: xgui4

Diff for: html/header.html

@@ -9,10 +9,11 @@
         <div class="navbar-nav">
           <a class="nav-link active" aria-current="page" href="index.html">Home</a>
           <a class="nav-link" href="app.html">Projet</a>
+          <a class="nav-link" href="https://xgui4.github.io/BoycottApple/">BoycottApple</a>
           <a class="nav-link" href="about.html">À propos</a>
           <a class="nav-link disabled" aria-disabled="true">Blog/News</a>
         </div>
       </div>
     </div>
   </nav>
-</div>
+</div>