Bump cross-spawn and docz in /docs

Bumps [cross-spawn](https://github.com/moxystudio/node-cross-spawn) to 7.0.6 and updates ancestor dependency [docz](https://github.com/doczjs/docz/tree/HEAD/core/docz). These dependencies need to be updated together.


Updates `cross-spawn` from 5.1.0 to 7.0.6
- [Changelog](https://github.com/moxystudio/node-cross-spawn/blob/master/CHANGELOG.md)
- [Commits](moxystudio/node-cross-spawn@5.1.0...v7.0.6)

Updates `docz` from 1.2.0 to 2.4.0
- [Release notes](https://github.com/doczjs/docz/releases)
- [Changelog](https://github.com/doczjs/docz/blob/main/core/docz/CHANGELOG.md)
- [Commits](https://github.com/doczjs/docz/commits/v2.4.0/core/docz)

---
updated-dependencies:
- dependency-name: cross-spawn
  dependency-version: 7.0.6
  dependency-type: indirect
- dependency-name: docz
  dependency-version: 2.4.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]