chore(deps): bump @ai-sdk/xai from 2.0.51 to 3.0.67

Bumps [@ai-sdk/xai](https://github.com/vercel/ai) from 2.0.51 to 3.0.67.
- [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/xai@2.0.51...@ai-sdk/xai@3.0.67)

---
updated-dependencies:
- dependency-name: "@ai-sdk/xai"
  dependency-version: 3.0.67
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

packages/opencode/package.json

@@ -68,7 +68,7 @@
     "@ai-sdk/provider-utils": "3.0.21",
     "@ai-sdk/togetherai": "1.0.34",
     "@ai-sdk/vercel": "1.0.33",
-    "@ai-sdk/xai": "2.0.51",
+    "@ai-sdk/xai": "3.0.67",
     "@aws-sdk/credential-providers": "3.993.0",
     "@clack/prompts": "1.0.0-alpha.1",
     "@gitlab/gitlab-ai-provider": "3.6.0",