make face anim delay more accessible

Source/CharacterPlugin/Public/Helper/VHFaceAnimation.h

@@ -88,7 +88,7 @@ public:
   FString AnimationFilename;
 
 	//delay the face animation by this amount of time (in seconds), for example, to compensate delay introduced by the audio processing 
-  UPROPERTY(EditAnywhere, BlueprintReadOnly)
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	float ConstantDelay = 0.0f;