Bump @ai-sdk/openai from 1.1.5 to 1.1.9

Bumps [@ai-sdk/openai](https://github.com/vercel/ai) from 1.1.5 to 1.1.9.
- [Release notes](https://github.com/vercel/ai/releases)
- [Changelog](https://github.com/vercel/ai/blob/main/CHANGELOG.md)
- [Commits](https://github.com/vercel/ai/compare/@ai-sdk/openai@1.1.5...@ai-sdk/openai@1.1.9)

---
updated-dependencies:
- dependency-name: "@ai-sdk/openai"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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