Update CHANGELOG

Author: stefanzweifel

CHANGELOG.md

@@ -5,7 +5,7 @@ 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).
 
-## [Unreleased](https://github.com/stefanzweifel/changelog-updater-action/compare/v1.5.0...HEAD)
+## [Unreleased](https://github.com/stefanzweifel/changelog-updater-action/compare/v1.6.0...HEAD)
 
 <!-- New Release notes will be placed here automatically -->
 ## [v1.2.1](https://github.com/stefanzweifel/changelog-updater-action/compare/v1.2.0...v1.2.1) - 2022-02-01
@@ -14,6 +14,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Fix `entrypoint.sh` file
 
+## [v1.6.0](https://github.com/stefanzweifel/changelog-updater-action/compare/v1.5.0...v1.6.0) - 2022-05-28
+
+### Added
+
+- Add `--heading-text` option to manipulate heading text ([#27](https://github.com/stefanzweifel/php-changelog-updater/pull/27))
+- Shift Headings of Release Notes to always be at least level 3 headings ([#24](https://github.com/stefanzweifel/php-changelog-updater/pull/24))
+
+### Fixed
+
+- Abort and show Error Message when Release Notes could not be placed ([#23](https://github.com/stefanzweifel/php-changelog-updater/pull/23))
+
 ## [v1.5.0](https://github.com/stefanzweifel/changelog-updater-action/compare/v1.4.1...v1.5.0) - 2022-03-20
 
 ## Added