chore(deps): bump langchain in /packages/python/chatgpt-wrapper

Bumps [langchain](https://github.com/langchain-ai/langchain) from 0.0.123 to 0.0.308.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@v0.0.123...v0.0.308)

---
updated-dependencies:
- dependency-name: langchain
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>