chore(deps): bump @ai-sdk/provider-utils from 2.1.13 to 2.2.8

Bumps [@ai-sdk/provider-utils](https://github.com/vercel/ai) from 2.1.13 to 2.2.8.
- [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/[email protected]...@ai-sdk/[email protected])

---
updated-dependencies:
- dependency-name: "@ai-sdk/provider-utils"
  dependency-version: 2.2.8
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -84,7 +84,7 @@
   "private": "true",
   "version": "12.0.6",
   "dependencies": {
-    "@ai-sdk/provider-utils": "^2.1.13",
+    "@ai-sdk/provider-utils": "^2.2.8",
     "ai": "^4.1.61",
     "zod": "^3.25.51"
   }

package.json

@@ -31,7 +31,7 @@
     "postbuild": "node ../../scripts/postbuild.js"
   },
   "dependencies": {
-    "@ai-sdk/provider-utils": "^2.0.7 ",
+    "@ai-sdk/provider-utils": "^2.2.8",
     "@ax-llm/ax": "12.0.6",
     "ai": "^4.0.33",
     "zod": "^3.23.8"