update mobile demo

packages/artplayer/src/style/bottom.scss

@@ -298,4 +298,11 @@
             display: none !important;
         }
     }
+
+    &.art-mobile {
+        .art-progress-indicator {
+            transform: scale(1, 1) !important;
+            visibility: visible !important;
+        }
+    }
 }

packages/artplayer/src/template.js

@@ -143,7 +143,7 @@ export default class Template {
         }
 
         if (isMobile) {
-            addClass(this.$container, 'art-mobile');
+            addClass(this.$player, 'art-mobile');
         }
     }