changelog: Add changelog entry

CHANGELOG.md

@@ -14,6 +14,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Add more general visitor `GenericMapPythonVisitor` for map types test `boost::unordered_map<std::string, int>` ([#504](https://github.com/stack-of-tasks/eigenpy/pull/504))
 - Support for non-[default-contructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible) types in map types ([#504](https://github.com/stack-of-tasks/eigenpy/pull/504))
 - Add type_info helpers ([#502](https://github.com/stack-of-tasks/eigenpy/pull/502))
+- Add NumPy 2 support ([#496](https://github.com/stack-of-tasks/eigenpy/pull/496))
 
 ### Changed