docs: Update CHANGELOG.md with v1.0.9

- Add v1.0.9 release notes
- Document Code of Conduct addition
- Add release tag link

Author: PeterVinter

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).
 
+## [v1.0.9] - 2024-11-18
+
+### Added
+- Comprehensive Code of Conduct
+- Professional standards and guidelines
+- Enforcement process
+- Community standards completion
+
 ## [v1.0.8] - 2024-11-18
 
 ### Security
@@ -59,6 +67,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Implemented security reporting process
 - Added recommended privileges documentation
 
+[v1.0.9]: https://github.com/PeterVinter/linux_docker_container_shutdown/releases/tag/v1.0.9
 [v1.0.8]: https://github.com/PeterVinter/linux_docker_container_shutdown/releases/tag/v1.0.8
 [v1.0.7]: https://github.com/PeterVinter/linux_docker_container_shutdown/releases/tag/v1.0.7
 [v1.0.6]: https://github.com/PeterVinter/linux_docker_container_shutdown/releases/tag/v1.0.6