fix: upgrade multiple dependencies with Snyk

Snyk has created this PR to upgrade:
  - @langchain/openai from 0.0.28 to 0.2.7.
    See this package in npm: https://www.npmjs.com/package/@langchain/openai
  - @langchain/community from 0.0.52 to 0.2.31.
    See this package in npm: https://www.npmjs.com/package/@langchain/community
  - langchain from 0.1.36 to 0.2.17.
    See this package in npm: https://www.npmjs.com/package/langchain

See this project in Snyk:
https://app.snyk.io/org/black-da-bull/project/5ad75f8c-bf6a-43a2-8109-a1409358152a?utm_source=github&utm_medium=referral&page=upgrade-pr