fix typo in gyro_drift_std

src/processor/processor_imu.cpp

@@ -112,7 +112,7 @@ void ProcessorImu::configure(SensorBasePtr _sensor)
     sensor_imu_ = std::static_pointer_cast<SensorImu>(_sensor);
 
     auto acc_drift_std  = sensor_imu_->getAbRateStdev();
-    auto gyro_drift_std = sensor_imu_->getAbRateStdev();
+    auto gyro_drift_std = sensor_imu_->getWbRateStdev();
 
     ArrayXd imu_drift_sigmas(6);
     imu_drift_sigmas << acc_drift_std, acc_drift_std, acc_drift_std, gyro_drift_std, gyro_drift_std, gyro_drift_std;