chore(deps): update dependency eslint to v9

Author: renovate[bot]

frontend/package.json

@@ -29,7 +29,7 @@
     "@typescript-eslint/eslint-plugin": "6.21.0",
     "@typescript-eslint/parser": "6.21.0",
     "@vitejs/plugin-react": "4.7.0",
-    "eslint": "8.57.1",
+    "eslint": "9.39.2",
     "eslint-config-productsway": "1.3.4",
     "prettier": "3.8.1",
     "typescript": "5.9.3",