Update changelog

Author: TomWright

CHANGELOG.md

@@ -678,7 +678,9 @@ See [documentation](https://daseldocs.tomwright.me) for all changes.
 
 - Everything!
 
-[unreleased]: https://github.com/TomWright/dasel/compare/v2.7.0...HEAD
+[unreleased]: https://github.com/TomWright/dasel/compare/v2.8.1...HEAD
+[v2.8.1]: https://github.com/TomWright/dasel/compare/v2.8.0...v2.8.1
+[v2.8.0]: https://github.com/TomWright/dasel/compare/v2.7.0...v2.8.0
 [v2.7.0]: https://github.com/TomWright/dasel/compare/v2.6.0...v2.7.0
 [v2.6.0]: https://github.com/TomWright/dasel/compare/v2.5.0...v2.6.0
 [v2.5.0]: https://github.com/TomWright/dasel/compare/v2.4.1...v2.5.0