Job success updates every 2 weeks. You can see when it was updated there: "Find Work" -> "My Stats".
So, as JSS was updated on May 14, the next update will be on May, 28 -> tomorrow.
Anita, hopefully you are aware that the Public Feedback (stars) Clients give you is not the only item that determines your JSS score. If you're not aware of this, there's an abundance of information on the subject within "Help and Support" and within this Community.