update changelog

Author: ytdHuang

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Implement `EnrSpace` and corresponding functionality. ([#500])
 - Check for orthogonality breakdown in `Lanczos` solver for `spectrum`. ([#501])
+- Fix errors in `Julia v1.12`. ([#507])
 
 ## [v0.32.1]
 Release date: 2025-06-24
@@ -258,3 +259,4 @@ Release date: 2024-11-13
 [#494]: https://github.com/qutip/QuantumToolbox.jl/issues/494
 [#500]: https://github.com/qutip/QuantumToolbox.jl/issues/500
 [#501]: https://github.com/qutip/QuantumToolbox.jl/issues/501
+[#507]: https://github.com/qutip/QuantumToolbox.jl/issues/507