Update migration/Jazzy.rst

Signed-off-by: Steve Macenski <[email protected]>

migration/Jazzy.rst

@@ -191,7 +191,7 @@ The ``local_namespace`` parameter has been removed and is now automatically set
 Parameters ``parent_namespace`` / ``use_sim_time`` both provide default values to maintain the ability of creating a ``Costmap2DROS`` object by just specifying a name.
 
 Option to disable collision checking in DriveOnHeading, BackUp and Spin Actions
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+*******************************************************************************
 
 In `PR #4785 <https://github.com/ros-navigation/navigation2/pull/4785>`_ a new boolean parameter named `disable_collision_checks` was added to the `DriveOnHeading`, `BackUp` and `Spin` actions to optionally disable collision checking. 
 This can be useful, for example, in cases where you want to move the robot even in the presence of known obstacles.