chore(deps): update dependency @nuxtjs/i18n to v9

Author: renovate[bot]

frontend/package.json

@@ -29,7 +29,7 @@
     "@nuxt/image": "1.9.0",
     "@nuxt/ui": "2.21.1",
     "@nuxtjs/eslint-config-typescript": "12.1.0",
-    "@nuxtjs/i18n": "8.5.5",
+    "@nuxtjs/i18n": "9.3.1",
     "@types/node": "22.13.10",
     "@typescript-eslint/parser": "7.18.0",
     "@vite-pwa/nuxt": "0.10.6",