Update changelog

Author: christophfroehlich

realtime_tools/CHANGELOG.rst

@@ -2,6 +2,11 @@
 Changelog for package realtime_tools
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+Forthcoming
+-----------
+* Replace deprecated spin_some in realtime_tools (backport `#448 <https://github.com/ros-controls/realtime_tools/issues/448>`_) (`#450 <https://github.com/ros-controls/realtime_tools/issues/450>`_)
+* Contributors: mergify[bot]
+
 3.10.0 (2025-10-06)
 -------------------
 * Add get_params method to the AsyncFunctionHandler (backport `#419 <https://github.com/ros-controls/realtime_tools/issues/419>`_) (`#420 <https://github.com/ros-controls/realtime_tools/issues/420>`_)