Update links to release notes

Author: ffdixon

_posts/2.4/2021-06-09-new.md

@@ -52,6 +52,8 @@ Under the hood, BigBlueButton 2.4 installs on Ubuntu 18.04 64-bit, and the follo
 
 For full details on what is new in BigBlueButton 2.4, see the release notes. Recent releases:
 
+- 2.4.7 (coming soon)
+- [2.4.6](https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.6)
 - [2.4.5](https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.5)
 - [2.4.4](https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.4)
 - [2.4.3](https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.3)