chore(deps): Bump openai from 1.47.1 to 1.50.2 in /examples/functions

Bumps [openai](https://github.com/openai/openai-python) from 1.47.1 to 1.50.2.
- [Release notes](https://github.com/openai/openai-python/releases)
- [Changelog](https://github.com/openai/openai-python/blob/main/CHANGELOG.md)
- [Commits](openai/openai-python@v1.47.1...v1.50.2)

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

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

examples/functions/requirements.txt

@@ -1,2 +1,2 @@
 langchain==0.3.0
-openai==1.47.1
+openai==1.50.2