Added sing short and long to NPC Audio script

UOP1_Project/Assets/NPCAudio.cs

 
 public class NPCAudio : CharacterAudio
 {
-	[SerializeField] private AudioCueSO idleSound, talk, footstep;
+	[SerializeField] private AudioCueSO singShort, singLong, talk, footstep;
-	public void PlayIdle() => _sfxEventChannel.RaisePlayEvent(idleSound, _audioConfig, transform.position);
+	public void PlaySingShort() => _sfxEventChannel.RaisePlayEvent(singShort, _audioConfig, transform.position);
+	public void PlaySingLong() => _sfxEventChannel.RaisePlayEvent(singLong, _audioConfig, transform.position);
 
 }