Fix Keras RS link in homepage. (#2098)

Author: hertschuh

theme/landing.html

@@ -147,7 +147,7 @@
               <a class="nav__link" href="/examples/">EXAMPLES</a>
             </li>
             <li class="nav__item"><a class="nav__link" href="/keras_tuner/">KERAS TUNER</a></li>
-            <li class="nav__item"><a class="nav__link" href="/keras_hub/">KERAS RS</a></li>
+            <li class="nav__item"><a class="nav__link" href="/keras_rs/">KERAS RS</a></li>
             <li class="nav__item"><a class="nav__link" href="/keras_hub/">KERAS HUB</a></li>
           </ul>