feat: refactor pagination implementation

src/feeds/all.liquid

@@ -9,14 +9,14 @@ permalink: /feed.xml
   {{ collections.posts | rssLastUpdatedDate }}{% endblock %}
 {% block entries %}
   {% assign posts = collections.posts | reverse %}
-  {% for post in posts %}
+  {% for post in posts limit: 15 %}
     <entry>
       <title>{{ post.data.title }}</title>
       <link href="{{ site.url }}{{ post.url }}" />
       <updated>{{ post.date | date: "%m.%d.%Y" }}</updated>
       <id>{{ site.url }}{{ post.url }}</id>
       <content type="html">
-        {{ post.data.post_excerpt | markdown }}
+        {{ post.data.post_excerpt | markdown | escape }}
       </content>
     </entry>
   {% endfor %}