Update Cedar Maintainers

[katherine-hough]

See cedar-policy/.github#24 and cedar-policy/.github#25 for approval from project maintainers.

Checklist for maintainer updates

• You've provided a link to documentation where the project has approved the maintainer changes.
• The maintainer(s) also created or updated their LFX Individual Dashboard profile.
• You've sent an email with the list of email address(es) to cncf-maintainer-changes@cncf.io for invitations to Service Desk and mailing lists. You can just mark this complete if you are only removing people.
• Optional: You've also sent a PR with affiliation updates to cncf/gitdm.

[netlify]

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[riaankleinhans]

@katherine-hough can you please also send an email address for @YanranZeng1 ?

[katherine-hough]

Thank you! I sent a list of email addresses to Robert Kielty and cncf-maintainer-changes@cncf.io via email. Does that work? Otherwise, what is a good email for me to send the list to?