chore(deps): bump the npm_and_yarn group across 1 directory with 3 updates

Bumps the npm_and_yarn group with 3 updates in the /docs directory: [cross-spawn](https://github.com/moxystudio/node-cross-spawn), [nextra](https://github.com/shuding/nextra) and [nextra-theme-docs](https://github.com/shuding/nextra).


Updates `cross-spawn` from 7.0.3 to 7.0.6
- [Changelog](https://github.com/moxystudio/node-cross-spawn/blob/master/CHANGELOG.md)
- [Commits](moxystudio/node-cross-spawn@v7.0.3...v7.0.6)

Updates `nextra` from 2.13.4 to 3.2.4
- [Release notes](https://github.com/shuding/nextra/releases)
- [Commits](https://github.com/shuding/nextra/compare/[email protected]@3.2.4)

Updates `nextra-theme-docs` from 2.13.4 to 3.2.4
- [Release notes](https://github.com/shuding/nextra/releases)
- [Commits](https://github.com/shuding/nextra/compare/[email protected]@3.2.4)

---
updated-dependencies:
- dependency-name: cross-spawn
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: nextra
  dependency-type: direct:production
  dependency-group: npm_and_yarn
- dependency-name: nextra-theme-docs
  dependency-type: direct:production
  dependency-group: npm_and_yarn
...

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

Author: dependabot[bot]