changelog: add entry

Author: jcarpent

CHANGELOG.md

@@ -9,6 +9,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Fixed
 
 - Fix Python library linkage for Debug build on Windows ([#514](https://github.com/stack-of-tasks/eigenpy/pull/514))
+- Fix np.ones when dtype is a custom user type ([#525](https://github.com/stack-of-tasks/eigenpy/pull/525))
 
 ## [3.10.1] - 2024-10-30