Charges against an 18-year-old Jersey City man have been upgraded to murder after a shooting victim died from his injuries, Hudson Hudson County Prosecutor Esther Suarez said Friday. Reginald Williams, 32,was shot in the torso on Forrest Street in Jersey City on May 8 and he died from the injuries at the Jersey City Medical Center on May 25, authorities said. Isiah Smith was arrested at his home on May 17 in connection with the shooting after a handgun, illegal high-capacity magazine and illegal hollow point bullets were recovered. With Williams’ death, Smith’s charges were upgrade to murder, …