Added note about qos_event removal in Jazzy (#4137) (#4142)

Signed-off-by: Alejandro Hernández Cordero <ahcorde@gmail.com>
(cherry picked from commit c3e44bf)

Co-authored-by: Alejandro Hernández Cordero <ahcorde@gmail.com>

source/Releases/Release-Jazzy-Jalisco.rst

@@ -63,6 +63,12 @@ Instead, ``rclcpp::get_message_typesupport_handle`` should be used.
 
 See https://github.com/ros2/rclcpp/pull/2209 for more details.
 
+Deprecated ``rclcpp/qos_event.hpp`` header was removed
+""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+In Iron, the header ``rclcpp/qos_event.hpp`` was deprecated in favor of ``rclcpp/event_handler.hpp``.
+In Jazzy, the ``rclcpp/qos_event.hpp`` header been completely removed.
+
 Type support helper for services
 """"""""""""""""""""""""""""""""