[dependency]: bump chai from 4.5.0 to 5.2.0 in /faucet/backend

Bumps [chai](https://github.com/chaijs/chai) from 4.5.0 to 5.2.0.
- [Release notes](https://github.com/chaijs/chai/releases)
- [Changelog](https://github.com/chaijs/chai/blob/main/History.md)
- [Commits](chaijs/chai@v4.5.0...v5.2.0)

---
updated-dependencies:
- dependency-name: chai
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

faucet/backend/package-lock.json

@@ -28,7 +28,7 @@
     "assert-plus": "^1.0.0",
     "axios-mock-adapter": "^2.0.0",
     "c8": "^10.1.2",
-    "chai": "^4.3.7",
+    "chai": "^5.2.0",
     "chai-as-promised": "^8.0.0",
     "eslint": "^8.46.0",
     "eslint-config-airbnb": "^19.0.4",