Add missing script overloading test link (#369)

Author: jonathanKingston

integration-test/test-pages/runtime-checks/index.html

@@ -12,6 +12,7 @@
     <ul>
       <li><a href="./pages/basic-run.html">Basic Run</a> - <a href="./config/basic-run.json">Config</a></li>
       <li><a href="./pages/filter-props.html">Filter props</a> - <a href="./config/filter-props.json">Config</a></li>
+      <li><a href="./pages/script-overload.html">Script overloading</a> - <a href="./config/script-overload.json">Config</a></li>
       <li><a href="./pages/shadow-dom.html">Shadow dom support</a> - <a href="./config/shadow-dom.json">Config</a></li>
     </ul>