The setup-java action page now says:

NOTE: AdoptOpenJDK got moved to Eclipse Temurin and won't be updated anymore. It is highly recommended to migrate workflows from adopt and adopt-openj9, to temurin and semeru respectively, to keep receiving software and security updates. See more details in the Good-bye AdoptOpenJDK post.

I think we need to move to "temurin" and hopefully everything will keep working as is.