Fix contributor name in CHANGELOG

Author: dbanty

CHANGELOG.md

@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Link to the GitHub repository from PyPI (#26). Thanks @theY4Kman!
 
 ### Fixes
-- Fixed some typing issues in generated clients and incorporate mypy into end to end tests (#32). Thanks @agray!
+- Fixed some typing issues in generated clients and incorporate mypy into end to end tests (#32). Thanks @acgray!
 
 ## 0.2.1 - 2020-03-22
 ### Fixes