update changelog entry

CHANGELOG.md

@@ -15,10 +15,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [1.20.0] - 2024-11-07
 
+
 ### Added
 
 ### Changed
-
+-Fixed Python error when a class inherits from a base class and inmplents 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)