build(deps): bump openai from 2.14.0 to 2.16.0 (#46)

Bumps [openai](https://github.com/openai/openai-python) from 2.14.0 to 2.16.0.
- [Release notes](https://github.com/openai/openai-python/releases)
- [Changelog](https://github.com/openai/openai-python/blob/main/CHANGELOG.md)
- [Commits](openai/openai-python@v2.14.0...v2.16.0)

---
updated-dependencies:
- dependency-name: openai
  dependency-version: 2.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -2,7 +2,7 @@ slack-sdk==3.39.0
 slack-bolt==1.27.0
 
 # If you use a different LLM vendor, replace this dependency
-openai==2.14.0
+openai==2.16.0
 
 pytest==9.0.2
 ruff==0.14.10