fix: fullscreen target updated to fullscreen fullscreen-target

Author: frankpagan

docs/index.html

@@ -114,7 +114,7 @@ <h2 class="padding:5px_0px">Demo</h2>
                                 <a class="margin-right:10px" hidden id="eye-slash" show="#eye, #demo-preview" hide="#eye-slash" toggle="code-height" toggle-target="#demo-code"><i class="fas fa-eye-slash"></i></a>
                                 <a class="margin-right:10px" id="code" show="#code-slash" hide="#code, #demo-code"><i class="fa fa-code"></i></a>
                                 <a class="margin-right:10px" hidden id="code-slash" show="#code, #demo-code" hide="#code-slash"><i class="fas fa-code"></i></a>
-                                <a class="margin-right:5px" fullscreen target="#playground"></a>
+                                <a class="margin-right:5px" fullscreen fullscreen-target="#playground"></a>
                             </div>
 
                         </div>