Update CHANGELOG.md

Author: jkbrzt

CHANGELOG.md

@@ -5,10 +5,14 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ## [3.0.1](https://github.com/httpie/httpie/compare/3.0.0...3.0.1) (2022-01-23)
 
+[What’s new in HTTPie 3.0 →](https://httpie.io/blog/httpie-3.0.0)
+
 - Changed the value shown as time elapsed from time-to-read-headers to total exchange time ([#1277](https://github.com/httpie/httpie/issues/1277))
 
 ## [3.0.0](https://github.com/httpie/httpie/compare/2.6.0...3.0.0) (2022-01-21)
 
+[What’s new in HTTPie 3.0 →](https://httpie.io/blog/httpie-3.0.0)
+
 - Dropped support for Python 3.6. ([#1177](https://github.com/httpie/httpie/issues/1177))
 - Improved startup time by 40%. ([#1211](https://github.com/httpie/httpie/pull/1211))
 - Added support for nested JSON syntax. ([#1169](https://github.com/httpie/httpie/issues/1169))