chore(deps): bump nanoid from 3.3.8 to 3.3.18 in /examples/rag/elastic-chatbot-rag-app/frontend - #219

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: contributor-assistant/github-action@ca4a40a7d1004f18d9960b404b97e5f30a505a08. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/