PROVIDENCE, R.I. — The Providence City Council this week approved a change to a zoning ordinance that would allow the Hope Point Tower, a 46-story luxury apartment building proposed for downtown Providence, to be built.But developers face a long road ahead before they can get the green light for construction.The change to the zoning ordinance approved by the City Council during a special meeting on Tuesday now sits before Mayor Jorge Elorza, who has until Nov.