Update changelog

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.2.2] - 2021-02-19
+
+This release was added to trigger Zenodo for producing a DOI.
+
+### Added
+
+- Docs badge
 
 ## [0.2.1] - 2021-02-18
 
@@ -47,6 +54,7 @@ First public release.
 
 - Original `GWFlowProposal` method renamed to `LegacyGWFlowProposal`. Will be removed in the next release.
 
-[Unreleased]: https://github.com/mj-will/nessai/compare/v0.2.0...HEAD
+[Unreleased]: https://github.com/mj-will/nessai/compare/v0.2.2...HEAD
+[0.2.2]: https://github.com/mj-will/nessai/compare/v0.2.1...v0.2.2
 [0.2.1]: https://github.com/mj-will/nessai/compare/v0.2.0...v0.2.1
 [0.2.0]: https://github.com/mj-will/nessai/compare/v0.1.1...v0.2.0