chore(deps): update dependency eslint to v9.39.0 (#236)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

backend/package-lock.json

@@ -50,7 +50,7 @@
     "@types/supertest": "6.0.3",
     "@typescript-eslint/eslint-plugin": "8.46.2",
     "@typescript-eslint/parser": "8.46.2",
-    "eslint": "9.38.0",
+    "eslint": "9.39.0",
     "eslint-config-prettier": "10.1.8",
     "eslint-plugin-prettier": "5.5.4",
     "jest": "30.2.0",