Update CHANGELOG

Author: bouwew

CHANGELOG.md

@@ -2,8 +2,9 @@
 
 Versions from 0.40 and up
 
-## Ongoing
+## v0.57.1
 
+- Bugfix for Stretch (Issue #833) via plugwise [v1.7.2](https://github.com/plugwise/python-plugwise/releases/tag/v1.7.2)
 - Implement HA Core PR [#138039](https://github.com/home-assistant/core/pull/138039)
 
 ## v0.57.0