One of the Bengals’ defensive standouts continues to be on the mend with an injury that’s ailed him for several weeks. Outside linebacker Vontaze Burfict (knee) wasn’t participating in Friday’s practice, Geoff Hobson of Bengals.com reported. The 24-year-old Burfict has sat out the last four games for Cincinnati, which leads the AFC North at 7-3-1.…