build(deps-dev): bump eslint from 9.39.5 to 10.10.0 in /backend

Bumps [eslint](https://github.com/eslint/eslint) from 9.39.5 to 10.10.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Commits](eslint/eslint@v9.39.5...v10.10.0)

---
updated-dependencies:
- dependency-name: eslint
  dependency-version: 10.10.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

backend/package.json

@@ -65,7 +65,7 @@
     "twilio": "^5.3.3"
   },
   "devDependencies": {
-    "eslint": "^9.28.0",
+    "eslint": "^10.10.0",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-prettier": "^5.5.6",
     "eslint-plugin-react": "^7.37.5",