docs: prepare 1.4.0 release (#292)

Author: PHILLIPS71

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.4.0] - 2024-05-06
+
 ### Changed
 
 - Execute action using `node20` instead of `node16` which is now deprecated.
@@ -53,7 +55,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Initial release!
 
-[Unreleased]: https://github.com/thomaseizinger/create-pull-request/compare/1.3.1...HEAD
+[Unreleased]: https://github.com/thomaseizinger/create-pull-request/compare/1.4.0...HEAD
+[1.4.0]: https://github.com/thomaseizinger/create-pull-request/compare/1.3.1...1.4.0
 [1.3.1]: https://github.com/thomaseizinger/create-pull-request/compare/1.3.0...1.3.1
 [1.3.0]: https://github.com/thomaseizinger/create-pull-request/compare/1.2.0...1.3.0
 [1.2.0]: https://github.com/thomaseizinger/create-pull-request/compare/1.1.0...1.2.0