fix(admin): Correct datagrid usage in email_template_index

Author: pan93412

templates/admin/email_template/index.html.twig

@@ -3,11 +3,11 @@
 {% block content_title %}郵件範本{% endblock %}
 
 {% block main %}
-    <table class="datagrid">
+    <table class="table datagrid">
         <thead>
         <tr>
-            <td>模板檔案路徑</td>
-            <td>功能</td>
+            <th><a href="#">範本名稱</a></th>
+            <th>動作</th>
         </tr>
         </thead>
         <tbody>