build(deps-dev): bump eslint-plugin-json from 3.1.0 to 4.0.1 in /backend

Bumps [eslint-plugin-json](https://github.com/azeemba/eslint-plugin-json) from 3.1.0 to 4.0.1.
- [Release notes](https://github.com/azeemba/eslint-plugin-json/releases)
- [Commits](https://github.com/azeemba/eslint-plugin-json/commits)

---
updated-dependencies:
- dependency-name: eslint-plugin-json
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

backend/package.json

@@ -73,7 +73,7 @@
     "eslint-import-resolver-typescript": "^3.6.3",
     "eslint-plugin-import": "^2.30.0",
     "eslint-plugin-jest": "^28.6.0",
-    "eslint-plugin-json": "^3.1.0",
+    "eslint-plugin-json": "^4.0.1",
     "eslint-plugin-n": "^16.6.2",
     "eslint-plugin-prettier": "^5.2.1",
     "eslint-plugin-promise": "^6.6.0",