fix(deps): update dependency react-i18next to v16

Author: renovate[bot]

package.json

@@ -24,7 +24,7 @@
     "i18next-browser-languagedetector": "^8.2.0",
     "react": "^19.1.0",
     "react-dom": "^19.1.0",
-    "react-i18next": "^15.6.0",
+    "react-i18next": "^16.0.0",
     "tailwindcss": "^4.1.11",
     "zod": "^4.1.12"
   },