sandbox-npm(deps-dev): bump flatted from 3.3.2 to 3.3.3 in /sandbox

Bumps [flatted](https://github.com/WebReflection/flatted) from 3.3.2 to 3.3.3.
- [Commits](WebReflection/flatted@v3.3.2...v3.3.3)

---
updated-dependencies:
- dependency-name: flatted
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]