message: mission: raise max retries
  This makes it more robust against message drops.
diff: @@ -135,7 +135,7 @@ private:
  // Ultimate it needs a setter.
  bool _enable_absolute_gimbal_yaw_angle{true};
  - static constexpr unsigned MAX_RETRIES = 5;
  + static constexpr unsigned MAX_RETRIES = 10;
  static constexpr uint8_t VEHICLE_MODE_FLAG_CUSTOM_MODE_ENABLED = 1;
  