docs: update changelog for v2.1.2

CHANGELOG.md

@@ -6,6 +6,13 @@ 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).
 
 ## [Unreleased]
+### Added
+### Changed
+### Fixed
+
+## [2.1.2] - 2023-04-02
+### Fixed
+- Use proper count for 429 response codes in metrics
 
 ## [2.1.1] - 2023-04-02
 ### Fixed
@@ -52,7 +59,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [1.0.0] - 2022-02-14
 Initial release! First stable version of GoGeizhalsBot is published as v1.0.0 
 
-[unreleased]: https://github.com/d-Rickyy-b/GoGeizhalsBot/compare/v2.1.1...HEAD
+[unreleased]: https://github.com/d-Rickyy-b/GoGeizhalsBot/compare/v2.1.2...HEAD
+[2.1.2]: https://github.com/d-Rickyy-b/GoGeizhalsBot/compare/v2.1.1...v2.1.2
 [2.1.1]: https://github.com/d-Rickyy-b/GoGeizhalsBot/compare/v2.1.0...v2.1.1
 [2.1.0]: https://github.com/d-Rickyy-b/GoGeizhalsBot/compare/v2.0.1...v2.1.0
 [2.0.1]: https://github.com/d-Rickyy-b/GoGeizhalsBot/compare/v2.0.0...v2.0.1