Merge pull request #28 from thc202/update-changelog

Author: kingthorin

CHANGELOG.md

@@ -4,6 +4,8 @@ All notable changes to this GitHub action will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [Unreleased]
+
 ## [0.5.0] - 2023-08-24
 ### Added
  - An input (`artifact_name`) used to name the artifact that contains the ZAP reports.
@@ -36,6 +38,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 First release to Marketplace.
 
+[Unreleased]: https://github.com/zaproxy/action-api-scan/compare/v0.5.0...HEAD
 [0.5.0]: https://github.com/zaproxy/action-api-scan/compare/v0.4.0...v0.5.0
 [0.4.0]: https://github.com/zaproxy/action-api-scan/compare/v0.3.1...v0.4.0
 [0.3.1]: https://github.com/zaproxy/action-api-scan/compare/v0.3.0...v0.3.1