Update CHANGELOG.md

Author: zengin

CHANGELOG.md

@@ -17,7 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
-- Generated beta models and request builders using Typewrite
+- Generated beta models and request builders using Typewriter
 
 ## [0.27.0] - 2021-09-17