Update articles/qos_deadline_liveliness_lifespan.md

Co-Authored-By: William Woodall <william+github@osrfoundation.org>

articles/qos_deadline_liveliness_lifespan.md

@@ -129,6 +129,7 @@ It will operate in a similar manner to the rcl_take and rmw_take functions that
 It will be used by the executors when they receive a notice via the waitset mentioned above that a resource has a new status event available.
 
 ## RMW Vendor Support
+
 All of these new QoS policies will need to be supported in the rmw implementations.
 As we add new QoS policies it is likely that not all rmw vendors will provide support for every QoS policy that ROS defines.
 This is especially true for non-DDS based implementations that do not already have native support for these features.