chore(deps): Bump joi in /examples/next/block-support (#2399)

Bumps [joi](https://github.com/hapijs/joi) from 18.1.2 to 18.2.1.
- [Commits](hapijs/joi@v18.1.2...v18.2.1)

---
updated-dependencies:
- dependency-name: joi
  dependency-version: 18.2.1
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]