add ratify maintainers to the list

[FeynmanZhou]

Pre-submission checklist

If you're adding a new maintainer to the CSV file, please confirm each of these actions has been completed:

• You've also sent a PR with updates to cncf/gitdm.
• The maintainer has updated their LFX Individual Dashboard profile.
• You've sent an email to [email protected] for access to Service Desk and the mailing lists for the email address.