Fix fade-in volume. When fade in, volume is restored to 1 not the volume of the setting. (#425)

Set the end value of DOFade to the value of the setting

Co-authored-by: Lee Hun <ceo.lhsg@gmail.com>

UOP1_Project/Assets/Scripts/Audio/SoundEmitters/SoundEmitter.cs

 		if (startTime <= _audioSource.clip.length)
 			_audioSource.time = startTime;
 
-		_audioSource.DOFade(1f, duration);
+		_audioSource.DOFade(settings.Volume, duration);
 	}
 
 	public float FadeMusicOut(float duration)