Add changelog

Author: albertomercurio

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Introduce new methods of `sesolve_map` and `mesolve_map` for advanced usage. Users can now customize their own `iter`ator structure, `prob_func` and `output_func`. ([#565])
 - Use `ProgressMeter.jl` for progress bar rather than our in-house implementation. ([#569])
+- Add support to arbitrary precision computation. Tested for `sesolve`, `mesolve` and `eigensolve`. ([#576])
 
 ## [v0.37.0]
 Release date: 2025-10-12
@@ -341,3 +342,4 @@ Release date: 2024-11-13
 [#557]: https://github.com/qutip/QuantumToolbox.jl/issues/557
 [#565]: https://github.com/qutip/QuantumToolbox.jl/issues/565
 [#569]: https://github.com/qutip/QuantumToolbox.jl/issues/569
+[#576]: https://github.com/qutip/QuantumToolbox.jl/issues/576