I can’t point you to any documentation (because I don’t know if there’s one), but I understand that in newer SonarQube versions it just want to know how many lines contain comments (CoreMetrics.COMMENT_LINES). You don’t need to specify which lines contain comments (the old COMMENT_LINES_DATA metric).
if you set only the COMMENT_LINES metric the values shown in the SonarQube UI will remain the same.