chore(deps)(deps-dev): bump ai

Bumps the development-dependencies group with 1 update in the / directory: [ai](https://github.com/vercel/ai/tree/HEAD/packages/ai).


Updates `ai` from 7.0.15 to 7.0.16
- [Release notes](https://github.com/vercel/ai/releases)
- [Changelog](https://github.com/vercel/ai/blob/main/packages/ai/CHANGELOG.md)
- [Commits](https://github.com/vercel/ai/commits/ai@7.0.16/packages/ai)

---
updated-dependencies:
- dependency-name: ai
  dependency-version: 7.0.16
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
...

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

Author: dependabot[bot]

packages/spec/package.json

@@ -211,7 +211,7 @@
   "devDependencies": {
     "@types/node": "^26.1.0",
     "@vitest/coverage-v8": "^4.1.10",
-    "ai": "^7.0.15",
+    "ai": "^7.0.16",
     "tsx": "^4.23.0",
     "typescript": "^6.0.3",
     "vitest": "^4.1.10"