modified changelog

Author: Iris Moini-Nazeri

CHANGELOG.md

@@ -6,7 +6,7 @@ Note: this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0
 
 ## [2.0.0] - 2021-08-09
 ### Removed
-- Support for Rails < 4.0
+- Support for Rails < 5
 
 ## [1.0.0] - 2020-09-16
 ### Added
@@ -49,6 +49,7 @@ Note: this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0
 ### Changed
 - Renamed the gem from `enum_column3` to `activerecord-mysql-enum`
 
+[2.0.0]: https://github.com/Invoca/activerecord-mysql-enum/compare/v1.0.0...v2.0.0
 [1.0.0]: https://github.com/Invoca/activerecord-mysql-enum/compare/v0.1.4...v1.0.0
 [0.1.4]: https://github.com/Invoca/activerecord-mysql-enum/compare/v0.1.3...v0.1.4
 [0.1.3]: https://github.com/Invoca/activerecord-mysql-enum/compare/v0.1.2...v0.1.3