bump version to v0.23.0

Author: ytdHuang

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+## [v0.23.0] (2024-12-04)
+
 - Change `SingleSiteOperator` with the more general `MultiSiteOperator`. ([#324])
 - Make `spectrum` and `correlation` functions align with `Python QuTiP`, introduce spectrum solver `PseudoInverse`, remove spectrum solver `FFTCorrelation`, and introduce `spectrum_correlation_fft`. ([#330])
 
@@ -15,7 +17,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Change the parameters structure of `sesolve`, `mesolve` and `mcsolve` functions to possibly support automatic differentiation. ([#311])
 - Fix type instability and reduce extra memory allocation in `liouvillian`. ([#315], [#318])
 
-
 ## [v0.21.5] (2024-11-15)
 
 - This is a demonstration of how to bump version number and also modify `CHANGELOG.md` before new release. ([#309])
@@ -30,6 +31,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [v0.21.4]: https://github.com/qutip/QuantumToolbox.jl/releases/tag/v0.21.4
 [v0.21.5]: https://github.com/qutip/QuantumToolbox.jl/releases/tag/v0.21.5
 [v0.22.0]: https://github.com/qutip/QuantumToolbox.jl/releases/tag/v0.22.0
+[v0.23.0]: https://github.com/qutip/QuantumToolbox.jl/releases/tag/v0.23.0
 [#139]: https://github.com/qutip/QuantumToolbox.jl/issues/139
 [#306]: https://github.com/qutip/QuantumToolbox.jl/issues/306
 [#309]: https://github.com/qutip/QuantumToolbox.jl/issues/309