Bump prettier from 3.0.0 to 3.5.1 in /backend

Bumps [prettier](https://github.com/prettier/prettier) from 3.0.0 to 3.5.1.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/prettier@3.0.0...3.5.1)

---
updated-dependencies:
- dependency-name: prettier
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

backend/package-lock.json

@@ -38,7 +38,7 @@
     "is-utorid": "^1.2.2",
     "node-fetch": "^2.6.12",
     "nodemailer": "^6.9.3",
-    "prettier": "^3.0.0",
+    "prettier": "^3.5.1",
     "winston": "^3.9.0"
   },
   "devDependencies": {