Change your channel information in News Publisher
After you add information about a channel, users with the Administrator role can update the channel name, website, and audience information at any time. Users with the Editor in Chief, Editor, or Sales roles can view the information, but not edit it.
Go to icloud.com, sign in, then click News Publisher.
Go to Settings > Channel Info, then make your changes.
Click Save.
Important: If you changed your channel name, be sure to update your logo, channel icon, and cover image to match.