chore(deps): bump @ai-sdk/openai from 1.3.23 to 2.0.15

Bumps [@ai-sdk/openai](https://github.com/vercel/ai) from 1.3.23 to 2.0.15.
- [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@1.3.23...@ai-sdk/openai@2.0.15)

---
updated-dependencies:
- dependency-name: "@ai-sdk/openai"
  dependency-version: 2.0.15
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

packages/sample-app/package.json

@@ -44,7 +44,7 @@
     "node": ">=14"
   },
   "dependencies": {
-    "@ai-sdk/openai": "^1.3.23",
+    "@ai-sdk/openai": "^2.0.19",
     "@anthropic-ai/sdk": "^0.56.0",
     "@aws-sdk/client-bedrock-runtime": "^3.848.0",
     "@azure/identity": "^4.4.1",