Update bootc maintainer list

[nimbinatus]

• feat(bootc): update bootc maintainers to match bootc-dev/bootc@dc28605

Relevant PRs: bootc-dev/bootc#1979 and bootc-dev/bootc#1667

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. - Request sent; will update once complete
• 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.