perf: refactor using semantic HTML (#1207)

Fixes #1196

_layouts/category.html

@@ -12,12 +12,12 @@ layout: page
     <span class="lead text-muted ps-2">{{ page.posts | size }}</span>
   </h1>
 
-  <ul class="post-content ps-0">
+  <ul class="content ps-0">
     {% for post in page.posts %}
       <li class="d-flex justify-content-between px-md-3">
         <a href="{{ post.url | relative_url }}">{{ post.title }}</a>
         <span class="dash flex-grow-1"></span>
-        {% include datetime.html date=post.date wrap='span' class='text-muted small' lang=lang %}
+        {% include datetime.html date=post.date class='text-muted small text-nowrap' lang=lang %}
       </li>
     {% endfor %}
   </ul>