Add new maintainer for Keycloak, and update affiliation for existing …

[stianst]

Adding new maintainer for the Keycloak project, see keycloak/keycloak#48672 / https://github.com/keycloak/keycloak/blob/main/MAINTAINERS.md

Updated company name for existing maintainers that moved to IBM.

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]

✅ Deploy Preview for cncf-license-exceptions canceled.

Name	Link
🔨 Latest commit	a4ab9b2
🔍 Latest deploy log	https://app.netlify.com/projects/cncf-license-exceptions/deploys/69fc3b003f93a70008d73a5e