build: bump @ungap/structured-clone from 1.2.0 to 1.2.1 (#1158)

Bumps [@ungap/structured-clone](https://github.com/ungap/structured-clone) from 1.2.0 to 1.2.1.
- [Commits](ungap/structured-clone@v1.2.0...v1.2.1)

---
updated-dependencies:
- dependency-name: "@ungap/structured-clone"
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>