changelog 1.2.9 (#8677)

* changelog 1.2.9

* Update CHANGELOG.md

Co-authored-by: Chris Marslender <[email protected]>

Co-authored-by: Jack Nelson <[email protected]>
Co-authored-by: Chris Marslender <[email protected]>

Author: 3 people

CHANGELOG.md

@@ -6,6 +6,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project does not yet adhere to [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
 for setuptools_scm/PEP 440 reasons.
 
+## 1.2.9 Chia blockchain 2021-10-01
+
+### Changed
+
+- Changed "About" section in client to indicate correct release version.
+
 ## 1.2.8 Chia blockchain 2021-09-30
 
 ### Added