Ruby? Not as far as I know. Matz rejected the Contributor Covenant, and instated the PostgreSQL CoC. Maybe you meant Ruby On Rails? They have adopted the Contributor Covenant.
Well, it is. They're the ones that push them through. It's classic bureaucratic maneuvering: it gives you a political hammer from which you can then further cement a position of authority by leveraging the threat of official censure.
See also the expansion of Title IX and the resulting chill on campus speech.