changelog: Add entry

Author: jorisv

CHANGELOG.md

@@ -36,6 +36,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 - Modernize python code base with ruff ([#2418](https://github.com/stack-of-tasks/pinocchio/pull/2418))
 - Does not create a root_joint frame from parsed models (urdf, mjcf and sdf) when no root joint is provided ([#2402](https://github.com/stack-of-tasks/pinocchio/pull/2402))
+- On GNU/Linux and macOS, hide all symbols by default ([#2469](https://github.com/stack-of-tasks/pinocchio/pull/2469))
 
 ## [3.2.0] - 2024-08-27