Hls quality (#409)

* update docs

docs/index.html

@@ -39,6 +39,10 @@
                                     <a
                                         href="/?libs=./uncompiled/artplayer-plugin-iframe/index.js&example=iframe">artplayer-plugin-iframe</a>
                                 </li>
+                                <li>
+                                    <a
+                                        href="/?libs=https://cdnjs.cloudflare.com/ajax/libs/hls.js/8.0.0-beta.3/hls.min.js%0A./uncompiled/artplayer-plugin-hls-quality/index.js&example=hls.quality">artplayer-plugin-hls-quality</a>
+                                </li>
                             </ul>
                             <ul>
                                 <li class="title">Tools</li>