Update CHANGELOG

Author: bjarn

CHANGELOG.md

@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 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).
 
+## v1.0.2 - 2025-12-23
+
+### What's Changed
+
+* feat: set custom User-Agent in API requests by @bjarn in https://github.com/lettermint/lettermint-python/pull/7
+
+**Full Changelog**: https://github.com/lettermint/lettermint-python/compare/v1.0.1...v1.0.2
+
 ## v1.0.1 - 2025-12-23
 
 ### What's Changed