chore(deps): Bump openai in /examples/langchain-chroma

Bumps [openai](https://github.com/openai/openai-python) from 1.51.1 to 1.51.2.
- [Release notes](https://github.com/openai/openai-python/releases)
- [Changelog](https://github.com/openai/openai-python/blob/main/CHANGELOG.md)
- [Commits](openai/openai-python@v1.51.1...v1.51.2)

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

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

examples/langchain-chroma/requirements.txt

@@ -1,4 +1,4 @@
 langchain==0.3.3
-openai==1.51.1
+openai==1.51.2
 chromadb==0.5.13
 llama-index==0.11.17