chore(changelog): update CHANGELOG.md

Author: ns-vasilev

CHANGELOG.md

@@ -18,6 +18,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - Implemented by [@ns-vasilev](https://github.com/ns-vasilev) in Pull Request [#9](https://github.com/space-code/network-layer/pull/9).
 
 ### Miscellaneous Tasks
+- Add codeowners
+  - Contributed by [@ns-vasilev](https://github.com/ns-vasilev) in Pull Request [#25](https://github.com/space-code/network-layer/pull/25).
 - Update workflow to run tests and build project
   - Contributed by [@ns-vasilev](https://github.com/ns-vasilev) in Pull Request [#11](https://github.com/space-code/network-layer/pull/11).
 - Update config