sandbox-npm(deps-dev): bump acorn from 8.15.0 to 8.16.0 in /sandbox

Bumps [acorn](https://github.com/acornjs/acorn) from 8.15.0 to 8.16.0.
- [Commits](acornjs/acorn@8.15.0...8.16.0)

---
updated-dependencies:
- dependency-name: acorn
  dependency-version: 8.16.0
  dependency-type: indirect
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]