Those sources (PHB, MM, DMG) have been updated in the Roll20 compendium, If you look up a reference on Roll20, it will reflect those latest changes. WotC typically sends the errata out to partners before it is published to the general public. By the time you saw the notice on the web (probably DnDBeyon), the changes were already made on Roll20 as well. This has been the pattern for as long as Roll20 has been a partner. Let me know if that's not answering your question.