Bump wpmetabox/meta-box from 5.8.2 to 5.9.2

Bumps [wpmetabox/meta-box](https://github.com/wpmetabox/meta-box) from 5.8.2 to 5.9.2.
- [Release notes](https://github.com/wpmetabox/meta-box/releases)
- [Commits](wpmetabox/meta-box@5.8.2...5.9.2)

---
updated-dependencies:
- dependency-name: wpmetabox/meta-box
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>