chore: add Olunusib to org

[toddbaert]

Add @Olunusib to the org.

@Olunusib has done some minor fixes in flagd:

• https://github.com/open-feature/flagd/pull/1126
• https://github.com/open-feature/flagd/pull/1127

But more recently has contributed features as well:

• https://github.com/open-feature/flagd/pull/1146
• https://github.com/open-feature/flagd/issues/1150

@Olunusib please :+1: or comment to confirm.