Fix syntax

Author: christophfroehlich

doc/migration.rst

@@ -6,4 +6,4 @@ This list summarizes important changes between Jazzy (previous) and Kilted (curr
 
 Pid/PidRos
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-* The parameters :paramref:`antiwindup`, :paramref:`i_clamp_max`, and :paramref:`i_clamp_min` have been removed. The anti-windup behavior is now configured via the :paramref:`AntiWindupStrategy` enum. (`#298 <https://github.com/ros-controls/control_toolbox/pull/298>`_).
+* The parameters ``antiwindup``, ``i_clamp_max``, and ``i_clamp_min`` have been removed. The anti-windup behavior is now configured via the ``AntiWindupStrategy`` enum. (`#298 <https://github.com/ros-controls/control_toolbox/pull/298>`_).