Bump nth-check and @wordpress/scripts in /admin/discourse-sidebar

Bumps [nth-check](https://github.com/fb55/nth-check) and [@wordpress/scripts](https://github.com/WordPress/gutenberg/tree/HEAD/packages/scripts). These dependencies needed to be updated together.

Updates `nth-check` from 1.0.2 to 2.1.1
- [Release notes](https://github.com/fb55/nth-check/releases)
- [Commits](fb55/nth-check@v1.0.2...v2.1.1)

Updates `@wordpress/scripts` from 14.0.1 to 24.0.0
- [Release notes](https://github.com/WordPress/gutenberg/releases)
- [Changelog](https://github.com/WordPress/gutenberg/blob/trunk/packages/scripts/CHANGELOG.md)
- [Commits](https://github.com/WordPress/gutenberg/commits/@wordpress/[email protected]/packages/scripts)

---
updated-dependencies:
- dependency-name: nth-check
  dependency-type: indirect
- dependency-name: "@wordpress/scripts"
  dependency-type: direct:development
...

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