frappe/webnotes/templates/includes/blog_subscribe.html

<h4>Subscribe</h4>
<br>
<p>
<button class="btn btn-warning btn-blog-subscribe">Get Updates via Email</button>
</p>
<p>
<img src="images/feed.png" style="margin-right: 4px; margin-bottom: -4px">
<a href="rss.xml" target="_blank">RSS Feed</a>
</p>