Use jazzy branch for realtime_tools (#2019)

Author: christophfroehlich

ros2_control.jazzy.repos

@@ -2,7 +2,7 @@ repositories:
   ros-controls/realtime_tools:
     type: git
     url: https://github.com/ros-controls/realtime_tools.git
-    version: master
+    version: jazzy
   ros-controls/control_msgs:
     type: git
     url: https://github.com/ros-controls/control_msgs.git