chore(deps): bump @ai-sdk/openai from 1.0.11 to 1.0.18

Bumps [@ai-sdk/openai](https://github.com/vercel/ai) from 1.0.11 to 1.0.18.
- [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@1.0.11...@ai-sdk/openai@1.0.18)

---
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>

package.json

@@ -633,7 +633,7 @@
     "@ai-sdk/anthropic": "^1.0.6",
     "@ai-sdk/azure": "^1.0.13",
     "@ai-sdk/google": "^1.0.12",
-    "@ai-sdk/openai": "^1.0.11",
+    "@ai-sdk/openai": "^1.0.18",
     "@types/minimatch": "^5.1.2",
     "ai": "^4.0.22",
     "ajv": "^8.17.1",