update changelog

Author: ytdHuang

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased](https://github.com/qutip/QuantumToolbox.jl/tree/main)
 
 - Fix Dynamical Fock Dimension states saving due to wrong saving of dimensions. ([#375])
+- Support a list of observables for `expect`. ([#374], [#376])
 
 ## [v0.25.0]
 Release date: 2025-01-20
@@ -85,4 +86,6 @@ Release date: 2024-11-13
 [#360]: https://github.com/qutip/QuantumToolbox.jl/issues/360
 [#370]: https://github.com/qutip/QuantumToolbox.jl/issues/370
 [#371]: https://github.com/qutip/QuantumToolbox.jl/issues/371
+[#374]: https://github.com/qutip/QuantumToolbox.jl/issues/374
 [#375]: https://github.com/qutip/QuantumToolbox.jl/issues/375
+[#376]: https://github.com/qutip/QuantumToolbox.jl/issues/376