message: mission_item: fix doxygen warnings
diff: @@ -36,7 +36,7 @@ public:
  /**
  * Sets the relative altitude of a mission item.
  *
  - * @param relative_altitude_m altitude relative to takeoff position in meters
  + * @param altitude_m altitude relative to takeoff position in meters
  */
  void set_relative_altitude(float altitude_m);
  @@ -51,7 +51,7 @@ public:
  /**
  * Sets the speed to use after a mission item.
  *
  - * @speed_m_s speed to use after this mission item in meters/second
  + * @param speed_m_s speed to use after this mission item in meters/second
  */
  void set_speed(float speed_m_s);
  