chore(python-deps): bump langchain-openai from 1.2.1 to 1.2.2

Bumps [langchain-openai](https://github.com/langchain-ai/langchain) from 1.2.1 to 1.2.2.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-openai==1.2.1...langchain-openai==1.2.2)

---
updated-dependencies:
- dependency-name: langchain-openai
  dependency-version: 1.2.2
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]