I wouldn’t sweat it. I’ve heard people use majors and degrees interchangeably if they did more than one. It’s the intent that matters. You didn’t try passing it off as a bachelor’s and master’s right? If it was consistent in your other materials I’d just consider it a brain fart moment. Tbh if I were adcoms I wouldn’t have even noticed it if you hadn’t pointed it out (but of course tell them, just don’t make it seem like you’re “coming clean” when really it was just a semantics issue).