changed v2.4 docs link in docs navbar

docs/_includes/navbar.html

@@ -10,7 +10,7 @@
         <div class="dropdown-menu py-0" aria-labelledby="navbarVersionDropdown">
           <a class="dropdown-item bg-info disabled" href="#">v3.0</a>
           <div class="dropdown-divider"></div>
-          <a class="dropdown-item" href="https://adminlte.io/docs/2.4/js-layout">v2.4</a>
+          <a class="dropdown-item" href="https://adminlte.io/docs/2.4/installation">v2.4</a>
           <a class="dropdown-item" href="https://adminlte.io/themes/AdminLTE/documentation/index.html"><= v2.3</a>
         </div>
       </li>