Bump version to 0.16.5 (#406)

Author: ntamas92

CHANGELOG.md

@@ -6,11 +6,15 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
-## [0.16.5](https://github.com/scaleapi/nucleus-python-client/releases/tag/v0.16.4) - 2023-10-12
+## [0.16.5](https://github.com/scaleapi/nucleus-python-client/releases/tag/v0.16.5) - 2023-10-30
 
 ### Added
 - Added a `description` to the slice info. 
 
+### Changed
+- Made `skeleton` key optional on `KeypointsAnnotation`. 
+
+
 ## [0.16.4](https://github.com/scaleapi/nucleus-python-client/releases/tag/v0.16.4) - 2023-10-23
 
 ### Added