chore(deps): Bump libphonenumber-js in /build/frontend-legacy

Bumps [libphonenumber-js](https://gitlab.com/catamphetamine/libphonenumber-js) from 1.12.36 to 1.12.37.
- [Changelog](https://gitlab.com/catamphetamine/libphonenumber-js/blob/master/CHANGELOG.md)
- [Commits](https://gitlab.com/catamphetamine/libphonenumber-js/compare/v1.12.36...v1.12.37)

---
updated-dependencies:
- dependency-name: libphonenumber-js
  dependency-version: 1.12.37
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]