You can check it out here. The Pewsitter headline is “Holy Thursday Chrism Mass not in prison this year”. However, I’m not sure if this is quite correct; I don’t think the Chrism Mass on Holy Thursday was held in the prison last year either.
Rather, I think the now-famous “foot washing of Muslim girl in Roman prison” took place during the Mass of the Lord’s Supper, normally celebrated in the late afternoon or evening of Holy Thursday, while the Chrism Mass will take place at St. Peter’s in the morning of that day. The Zenit article states that in connection with the Mass of the Lord’s Supper, “like last year and in previous years in Buenos Aires, he [Francis] will select a situation of a special nature from a pastoral point of view, which will be communicated when appropriate.” Perhaps a homeless shelter, or orphanage, or somewhere else altogether this year.