build(deps): bump langchain-openai from 0.2.1 to 0.2.2

Bumps [langchain-openai](https://github.com/langchain-ai/langchain) from 0.2.1 to 0.2.2.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-openai==0.2.1...langchain-openai==0.2.2)

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

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

requirements.txt

@@ -1,6 +1,6 @@
 defusedxml==0.7.1
 langchain_core==0.3.6
-langchain_openai==0.2.1
+langchain_openai==0.2.2
 numpy==2.1.1
 pandas==2.2.3
 python-dotenv==1.0.1