Some 500 cyclists took to the streets of Burlington on Wednesday evening to honor 16-year-old Shiloh Skalka, who was fatally struck by a vehicle last month while riding her e-bike. Friends, relatives and fellow cyclists converged on the intersection of Pine Street and Locust Street, the site of the July 16 crash, where a memorial for Skalka now includes an all-white “ghost bike.” Amid a steady, light rain, a procession of cyclists pedaled a two-…