chore: update CHANGELOG for v4.0.24

Version 4.0.24 was released to marketplace but CHANGELOG still showed 4.0.23.
This updates the CHANGELOG to reflect the actual released version.

Author: teg-atlassian

CHANGELOG.md

@@ -1,6 +1,6 @@
 ### [Report an Issue](https://github.com/atlassian/atlascode/issues)
 
-## What's new in 4.0.23
+## What's new in 4.0.24
 
 ### Features