docs(changelog): cut 0.0.2 (promote Unreleased) (#8)

- promote the [Unreleased] section to [0.0.2] - 2026-07-05 (en + ko)
  ahead of tagging so the release commit carries the finalized entry

#docs #release

Author: htcom-code

CHANGELOG.ko.md

@@ -8,7 +8,7 @@
 
 버전이 `0.x` 인 동안에는 마이너 릴리스 사이에 공개 API 가 바뀔 수 있다.
 
-## [Unreleased]
+## [0.0.2] - 2026-07-05
 
 ### 변경 (Changed)
 

CHANGELOG.md

@@ -8,7 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 While the version is `0.x`, the public API may change between minor releases.
 
-## [Unreleased]
+## [0.0.2] - 2026-07-05
 
 ### Changed