comment out with swig syntax

src/server/views/layout-growi/widget/header.html

@@ -8,8 +8,8 @@
       </div>
       <div class="title-container">
         <h1 class="title" id="revision-path"></h1>
-        <!-- [TODO] GC-1391 activate -->
-        <!-- <h1 class="title" id="tag-viewer"></h1> -->
+        {# [TODO] GC-1391 activate #}
+        {# <h1 class="title" id="tag-viewer"></h1> #}
         <div id="revision-url" class="url-line"></div>
       </div>
       {% if page %}