fix: update class sortable to attribute sortable

Author: frankpagan

src/dashboard.html

@@ -140,7 +140,7 @@ <h2>$500</h2>
             <!--  </div>-->
             <!--  <div class="border:bottom border-color-extra-medium-gray">-->
             <!--    <div class="display:flex align-items:center margin:0px_15px">-->
-            <!--      <form collection="module_activity" class="Sortable" dnd-group-name="task-items" id="testForm">-->
+            <!--      <form collection="module_activity" sortable dnd-group-name="task-items" id="testForm">-->
                   <!-- sortable task item -->
             <!--        <div id="task-item" class="display:flex flex-wrap-nowrap align-items:center margin:0px_15px padding:10px_0px template">-->
             <!--          <h3>Something...</h3>-->