Improve RSS experience

Problem: Currently the RSS feed isn't in a location where it's likely to be seen and it isn't detected by Akregator when using the getmonero.org URL to add a feed. Improving the RSS feed experience drives RSS adoption and helps increase readership of blog posts.

Solution:

1. Put RSS feed somewhere that isn't the very bottom of the website
2. Look into what's required for RSS readers like KDE's Akregator to detect RSS feeds on getmonero.org