chore(deps): bump langsmith

Bumps [langsmith](https://github.com/langchain-ai/langsmith-sdk) from 0.7.31 to 0.8.0.
- [Release notes](https://github.com/langchain-ai/langsmith-sdk/releases)
- [Commits](langchain-ai/langsmith-sdk@v0.7.31...v0.8.0)

---
updated-dependencies:
- dependency-name: langsmith
  dependency-version: 0.8.0
  dependency-type: indirect
...

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Author: dependabot[bot]