changelog: update

Author: jcarpent

CHANGELOG.md

@@ -13,6 +13,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Added
 - Support for Python slice, tuple and list indexing for `std::vector` bindings ([#592](https://github.com/stack-of-tasks/eigenpy/pull/592))
 
+### Fixed
+- Fix partly the support of change of API of GeneralizedEigenSolverVisitor ([]())
+
 ## [3.12.0] - 2025-08-12
 
 ### Added