build(deps): bump openai from 2.44.0 to 3.20.0

Bumps [openai](https://github.com/openai/openai-python) from 2.44.0 to 3.20.0.
- [Release notes](https://github.com/openai/openai-python/releases)
- [Changelog](https://github.com/openai/openai-python/blob/main/CHANGELOG.md)
- [Commits](https://github.com/openai/openai-python/compare/v2.44.0...v3.20.0)

---
updated-dependencies:
- dependency-name: openai
  dependency-version: 3.20.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

requirements.txt

@@ -1,6 +1,6 @@
 anthropic==0.116.0
 google-genai==2.10.0
-openai==2.44.0
+openai==3.20.0
 pre-commit==4.6.0
 pyyaml==6.0.3
 questionary==2.1.1