chore(changelog): update CHANGELOG.md

Author: ns-vasilev

CHANGELOG.md

@@ -18,7 +18,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `1.0.x` Releases - [1.0.0](#100)
 
 ---
+## [Unreleased]
 
+### Documentation
+- Update `README.md`
+  - Documented by [@ns-vasilev](https://github.com/ns-vasilev) in Pull Request [#188](https://github.com/space-code/flare/pull/188).
 
 ## [3.3.0](https://github.com/space-code/flare/releases/tag/3.3.0)
 
@@ -332,6 +336,7 @@ Released on 2023-01-20. All issues associated with this milestone can be found u
 - Swift Concurrency Support [#1]
   - Contributed by [@ns-vasilev](https://github.com/ns-vasilev) in Pull Request [#1](https://github.com/space-code/flare/pull/1).
 
+[unreleased]: https://github.com/space-code/flare/compare/3.3.0..HEAD
 [3.3.0]: https://github.com/space-code/flare/compare/3.2.0..3.3.0
 [3.2.0]: https://github.com/space-code/flare/compare/3.1.0..3.2.0
 [3.1.0]: https://github.com/space-code/flare/compare/3.0.2..3.1.0