If you ever have any questions regarding Certifications, we always recommend checking out our Certifications page. This has the most updated requirements needed for each certification. If you look on the right side, it will indicate the latest version of the exam and then under the certification description, the Missions/courses need to prepare for the exam.
For the Pega Robotics exam, it is currently linked out to the version 8.0 Robotics course material, because the exam is still in version 8.1. Any other additional material you study, will be beneficial but not required.