chore: bump @firebase/rules-unit-testing in /src/api/users (#2321)

Bumps [@firebase/rules-unit-testing](https://github.com/firebase/firebase-js-sdk/tree/HEAD/packages/rules-unit-testing) from 1.3.15 to 2.0.1.
- [Release notes](https://github.com/firebase/firebase-js-sdk/releases)
- [Changelog](https://github.com/firebase/firebase-js-sdk/blob/master/packages/rules-unit-testing/CHANGELOG.md)
- [Commits](https://github.com/firebase/firebase-js-sdk/commits/@firebase/rules-unit-testing@2.0.1/packages/rules-unit-testing)

---
updated-dependencies:
- dependency-name: "@firebase/rules-unit-testing"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

src/api/users/package.json

@@ -13,7 +13,7 @@
     "http-link-header": "^1.0.3"
   },
   "devDependencies": {
-    "@firebase/rules-unit-testing": "^1.2.9",
+    "@firebase/rules-unit-testing": "^2.0.1",
     "env-cmd": "^10.1.0",
     "firebase-tools": "^9.9.0",
     "nodemon": "^2.0.7",