Update index.html to remove QQ群•320881312 and add a new div for QQ群•320881312 in the tool section

docs/index.html

@@ -87,10 +87,10 @@
                 </div>
             </div>
             <a class="item" href="./document/">Document</a>
-            <div class="item">QQ群•320881312</div>
             <a class="item" href="https://github.com/zhw2590582/ArtPlayer">Github</a>
         </div>
         <div class="tool">
+            <div class="qq">QQ群•320881312</div>
             <div class="checkbox">
                 <input type="checkbox" id="typeScript"><label for="typeScript">TS</label>
             </div>