These resources discuss the 7th edition of APA style (2020) and provide information about content changes. Additional information can be found on APA's style blog, APA's Quick Answers about the References changes, or via a general search on the Internet, such as the ones shown below.
The 6th edition is still in use but APA no longer posts new information on their 6th edition blog (though the archived version is still available online: https://blog.apastyle.org/apastyle/how-to.