chore(deps): bump openai from 1.98.0 to 2.6.1

Bumps [openai](https://github.com/openai/openai-python) from 1.98.0 to 2.6.1.
- [Release notes](https://github.com/openai/openai-python/releases)
- [Changelog](https://github.com/openai/openai-python/blob/main/CHANGELOG.md)
- [Commits](openai/openai-python@v1.98.0...v2.6.1)

---
updated-dependencies:
- dependency-name: openai
  dependency-version: 2.6.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements/base.txt

@@ -10,7 +10,7 @@ langchain-tests==0.3.20
 langchain-text-splitters==0.3.9
 langchainhub==0.1.21
 langsmith==0.4.9
-openai==1.98.0
+openai==2.6.1
 pinecone==7.3.0
 pinecone-text
 pydantic