chore(Changelog): prepare for v0.2.1 release

CHANGELOG.md

@@ -7,6 +7,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.2.1]
+
+### Added
+
+* Support for Python 3.12 in https://github.com/CQCL/pytket-phir/pull/89
+
+### Fixed
+
+* RZ/R1XY order swapping issue in https://github.com/CQCL/pytket-phir/pull/82
+* Various phirgen bugs in https://github.com/CQCL/pytket-phir/pull/90:
+
+  * `ClassicalExpBox` conversion is incomplete https://github.com/CQCL/pytket-phir/issues/86
+  * `KeyError: 'name'` raised by `pytket_to_phir` with arithmetic operation https://github.com/CQCL/pytket-phir/issues/87
+  * `TypeError: 'int' object is not subscriptable` raised by `pytket_to_phir` with arithmetic operation https://github.com/CQCL/pytket-phir/issues/88
+
 ## [0.2.0]
 
 ### Added
@@ -44,6 +59,7 @@ First release.
 [0.1.1]: https://github.com/CQCL/pytket-phir/compare/v0.1.0...v0.1.1
 [0.1.2]: https://github.com/CQCL/pytket-phir/compare/v0.1.1...v0.1.2
 [0.2.0]: https://github.com/CQCL/pytket-phir/compare/v0.1.2...v0.2.0
-[unreleased]: https://github.com/CQCL/pytket-phir/compare/v0.2.0...HEAD
+[0.2.1]: https://github.com/CQCL/pytket-phir/compare/v0.2.0...v0.2.1
+[unreleased]: https://github.com/CQCL/pytket-phir/compare/v0.2.1...HEAD
 
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