[charms] Nominate Luciano Giudice for charms-ceph core

Hello all, I'd like to propose Luciano as a new Ceph charms core team member. He has contributed quality changes over the last year, and has been providing quality reviews for the Ceph charms. patches: https://review.opendev.org/q/owner:luciano.logiudice%2540canonical.com reviews: https://review.opendev.org/q/reviewedby:luciano.logiudice%2540canonical.com I hope you will join me in supporting Luciano. Chris MacNaughton