Fix missing yaml entry, fedbages complain:
    
    Initializing rule for '/usr/share/badges/rules/release-party-f31-organizer.yml' failed with
    ValueError("BadgeRule requires frozenset(['name', 'creator', 'discussion', 'issuer_id', 'trigger', 'image_url',
    'criteria', 'description']).  Missing frozenset(['trigger', 'criteria'])",)