Update docs/index.html

Co-authored-by: Julien Richard-Foy <julien@richard-foy.fr>

Author: BarkingBad

docs/index.html

@@ -35,7 +35,7 @@
                         </a>
                     </li>
                     <li class="nav-item">
-                        <a class="nav-link" href="api/index.html">
+                        <a class="nav-link" href="https://scala-lang.org/api/3.x/">
                             API
                         </a>
                     </li>