restructured modeling a traffic participant

Signed-off-by: Stefan Cyliax <stefan.cyliax@asam.net>

Author: Stefan Cyliax

doc/open-simulation-interface_user_guide.adoc

@@ -50,7 +50,7 @@ include::./architecture/logical_model.adoc[leveloffset=+3]
 
 include::./architecture/traffic_participant.adoc[leveloffset=+3]
 
-include::./usecases/modeling_traffic_participant.adoc[leveloffset=+3]
+include::./usecases/modeling_traffic_participant.adoc[leveloffset=+4]
 
 //include::./architecture/vehicle_dynamics.adoc[leveloffset=+3]