update ads demo

docs/index.html

@@ -31,6 +31,10 @@
                                     <a
                                         href="/?libs=./uncompiled/artplayer-plugin-danmuku/index.js&example=danmuku">artplayer-plugin-danmuku</a>
                                 </li>
+                                <li>
+                                    <a
+                                        href="/?libs=./uncompiled/artplayer-plugin-ads/index.js&example=ads">artplayer-plugin-ads</a>
+                                </li>
                             </ul>
                             <ul>
                                 <li class="title">Tools</li>