Updates kgateway maintainers

[chandler-solo]

... to match https://github.com/kgateway-dev/community/blob/82261a10c2349b1c7ff03fea80ceb977e5c2eebc/MAINTAINERS.md

See also https://github.com/kgateway-dev/community/blob/82261a10c2349b1c7ff03fea80ceb977e5c2eebc/GOVERNANCE.md

Checklist for maintainer updates

Note

Delete this template if you're not changing the CSV file

• 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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