Release v5.9.0 (#545)

Co-authored-by: github-actions <[email protected]>

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [5.9.0] - 2022-01-18
+
 ### Changed
 
 - In azure, force service principal credentials to be explicitely set.
@@ -364,7 +366,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Add github release workflows.
 
-[Unreleased]: https://github.com/giantswarm/giantnetes-terraform/compare/v5.8.1...HEAD
+[Unreleased]: https://github.com/giantswarm/giantnetes-terraform/compare/v5.9.0...HEAD
+[5.9.0]: https://github.com/giantswarm/giantnetes-terraform/compare/v5.8.1...v5.9.0
 [5.8.1]: https://github.com/giantswarm/giantnetes-terraform/compare/v5.8.0...v5.8.1
 [5.8.0]: https://github.com/giantswarm/giantnetes-terraform/compare/v5.7.1...v5.8.0
 [5.7.1]: https://github.com/giantswarm/giantnetes-terraform/compare/v5.7.0...v5.7.1