build(deps): bump cross-spawn and @edx/frontend-build

Bumps [cross-spawn](https://github.com/moxystudio/node-cross-spawn) to 7.0.6 and updates ancestor dependency [@edx/frontend-build](https://github.com/openedx/frontend-build). These dependencies need to be updated together.


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 `@edx/frontend-build` from 8.0.6 to 13.0.14
- [Release notes](https://github.com/openedx/frontend-build/releases)
- [Commits](openedx/frontend-build@v8.0.6...v13.0.14)

---
updated-dependencies:
- dependency-name: cross-spawn
  dependency-type: indirect
- dependency-name: "@edx/frontend-build"
  dependency-type: direct:production
...

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