change comments area layout

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

@@ -1,8 +1,8 @@
 <div class="page-comments-row row d-edit-none d-print-none">
 
-  <div class="page-comments col-xl-7 col-lg-9">
+  <div class="page-comments col-xl-7 col-lg-9 my-5">
 
-    <h4 class="my-2"><i class="icon-fw icon-bubbles"></i> Comments</h4>
+    <h1 class="border-bottom pb-2 mb-3"><i class="icon-fw icon-bubbles"></i> Comments</h1>
 
     <div class="page-comments-list" id="page-comments-list"></div>