Fix typo (#80)

Author: dsobek

moveit_studio_msgs/moveit_studio_agent_msgs/msg/ObjectiveServerStatus.msg

@@ -11,7 +11,7 @@ int8 OBJECTIVE_STATUS_IDLE = 1
 int8 OBJECTIVE_STATUS_RUNNING = 2
 int8 OBJECTIVE_STATUS_SUCCESS = 3
 int8 OBJECTIVE_STATUS_FAILURE = 4
-int8 OBJECTIVE_STATUS_CANCELED = 5
+int8 OBJECTIVE_STATUS_CANCELLED = 5
 
 # The status of the objective.
 int8 objective_status