build(deps): bump ruff from 0.14.7 to 0.15.1

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.14.7 to 0.15.1.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.14.7...0.15.1)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.15.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

openai-agents-sdk/requirements.txt

@@ -5,4 +5,4 @@ openai-agents
 python-dotenv==1.2.1
 
 pytest
-ruff==0.14.7
+ruff==0.15.1