add changelog entry

Author: nim65s

CHANGELOG.md

@@ -17,6 +17,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fix aba explicit template instantiation ([#2541](https://github.com/stack-of-tasks/pinocchio/pull/2541))
 - Fix mjcf parsing of keyframe qpos with newlines ([#2535](https://github.com/stack-of-tasks/pinocchio/pull/2535))
 - Fix sites parsing for MJCF format ([#2548](https://github.com/stack-of-tasks/pinocchio/pull/2548))
+- Removed useless uses of `PINOCCHIO_WITH_CXX11_SUPPORT` ([#2564](https://github.com/stack-of-tasks/pinocchio/pull/2564))
 
 
 ## [3.3.1] - 2024-12-13