2004 Camry Belt Tensioner Adjustment?

Looking for some advice. Just replaced the alternator on my 2004 Camry and now whenever there's a gear shift I can hear a high-pitched whine coming from the alternator.

Research suggests that this may be an issue with the automatic belt tensioner not applying the proper amount of pressure. Is there any way to adjust the automatic tensioner to loosen it up or should I replace it?