update CHANGELOG for 1.0.15

Author: jas2600

CHANGELOG.md

@@ -87,8 +87,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Release of the Cleanlab TLM Python client.
 
-[Unreleased]: https://github.com/cleanlab/cleanlab-tlm/compare/v1.0.14...HEAD
-[1.0.13]: https://github.com/cleanlab/cleanlab-tlm/compare/v1.0.13...v1.0.14
+[Unreleased]: https://github.com/cleanlab/cleanlab-tlm/compare/v1.0.15...HEAD
+[1.0.15]: https://github.com/cleanlab/cleanlab-tlm/compare/v1.0.14...v1.0.15
+[1.0.14]: https://github.com/cleanlab/cleanlab-tlm/compare/v1.0.13...v1.0.14
 [1.0.13]: https://github.com/cleanlab/cleanlab-tlm/compare/v1.0.12...v1.0.13
 [1.0.12]: https://github.com/cleanlab/cleanlab-tlm/compare/v1.0.11...v1.0.12
 [1.0.11]: https://github.com/cleanlab/cleanlab-tlm/compare/v1.0.10...v1.0.11