I just checked the CAKE in ROS v7.1beta5. It still believes that the DSCP codepoint for Least-Effort traffic is CS1(0x8). According to
https://tools.ietf.org/html/rfc8622, the IANA has created a specific DSCP codepoint for Least-Effort traffic, LE(0x1). From what I can tell in the CAKE mailing group, CAKE switched to the new LE codepoint during the middle of 2020.