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

Bumps [libphonenumber-js](https://gitlab.com/catamphetamine/libphonenumber-js) from 1.13.11 to 1.13.12.
- [Changelog](https://gitlab.com/catamphetamine/libphonenumber-js/blob/master/CHANGELOG.md)
- [Commits](https://gitlab.com/catamphetamine/libphonenumber-js/compare/v1.13.11...v1.13.12)

---
updated-dependencies:
- dependency-name: libphonenumber-js
  dependency-version: 1.13.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

build/frontend-legacy/package-lock.json

@@ -66,7 +66,7 @@
     "escape-html": "^1.0.3",
     "focus-trap": "^8.2.2",
     "is-svg": "^6.1.0",
-    "libphonenumber-js": "^1.13.11",
+    "libphonenumber-js": "^1.13.12",
     "lodash": "^4.18.1",
     "marked": "^18.0.11",
     "moment": "^2.30.1",