move changelog entry to unreleased section.

CHANGELOG.md

@@ -13,13 +13,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
-## [1.20.0] - 2024-11-07
+- Fixed Python error when a class inherits from a base class and implements an interface. [5637](https://github.com/microsoft/kiota/issues/5637)
 
+## [1.20.0] - 2024-11-07
 
 ### Added
 
 ### Changed
-- Fixed Python error when a class inherits from a base class and implements an interface. [5637](https://github.com/microsoft/kiota/issues/5637)
+
 - Fixed python generation client serailization failure str being quoted as "str"
 - Fixed Issue with primitive values being stringified in python python. [#5417](https://github.com/microsoft/kiota/issues/5417)
 - Fixed an issue where multipart request content would be ignored if other unstructured content was present in the description. [#5638](https://github.com/microsoft/kiota/issues/5638)