ekf2: Fix dimensional error in gyro and accel bias variance conversions

src/modules/ekf2/EKF/ekf.h

@@ -230,8 +230,8 @@ public:
 	Vector3f getAccelBias() const { return _state.delta_vel_bias / _dt_ekf_avg; } // get the accelerometer bias in m/s**2
 	const Vector3f &getMagBias() const { return _state.mag_B; }
 
-	Vector3f getGyroBiasVariance() const { return Vector3f{P(10, 10), P(11, 11), P(12, 12)} / _dt_ekf_avg; } // get the gyroscope bias variance in rad/s
-	Vector3f getAccelBiasVariance() const { return Vector3f{P(13, 13), P(14, 14), P(15, 15)} / _dt_ekf_avg; } // get the accelerometer bias variance in m/s**2
+	Vector3f getGyroBiasVariance() const { return Vector3f{P(10, 10), P(11, 11), P(12, 12)} / sq(_dt_ekf_avg); } // get the gyroscope bias variance in rad/s
+	Vector3f getAccelBiasVariance() const { return Vector3f{P(13, 13), P(14, 14), P(15, 15)} / sq(_dt_ekf_avg); } // get the accelerometer bias variance in m/s**2
 	Vector3f getMagBiasVariance() const { return Vector3f{P(19, 19), P(20, 20), P(21, 21)}; }
 
 	// get GPS check status