release v1.4.0 (#385)

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]
 
+## [1.4.0] - 2020-09-16
+
 ### Changed
 
 - Update AWS CNI version to 1.7.2 and align manifests with upstream.
@@ -93,7 +95,8 @@ 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/v1.3.2...HEAD
+[Unreleased]: https://github.com/giantswarm/giantnetes-terraform/compare/v1.4.0...HEAD
+[1.4.0]: https://github.com/giantswarm/giantnetes-terraform/compare/v1.3.2...v1.4.0
 [1.3.2]: https://github.com/giantswarm/giantnetes-terraform/compare/v1.3.1...v1.3.2
 [1.3.1]: https://github.com/giantswarm/giantnetes-terraform/compare/v1.3.0...v1.3.1
 [1.3.0]: https://github.com/giantswarm/giantnetes-terraform/compare/v1.2.0...v1.3.0