chore(deps): bump @ai-sdk/google from 3.0.82 to 4.0.18

Bumps [@ai-sdk/google](https://github.com/vercel/ai/tree/HEAD/packages/google) from 3.0.82 to 4.0.18.
- [Release notes](https://github.com/vercel/ai/releases)
- [Changelog](https://github.com/vercel/ai/blob/main/packages/google/CHANGELOG.md)
- [Commits](https://github.com/vercel/ai/commits/@ai-sdk/google@4.0.18/packages/google)

---
updated-dependencies:
- dependency-name: "@ai-sdk/google"
  dependency-version: 4.0.18
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pnpm-lock.yaml

@@ -72,7 +72,7 @@ peerDependencyRules:
 catalog:
   '@ai-sdk/anthropic': 3.0.84
   '@ai-sdk/deepseek': 2.0.39
-  '@ai-sdk/google': 3.0.82
+  '@ai-sdk/google': 4.0.18
   '@ai-sdk/openai': 3.0.71
   '@ai-sdk/react': 3.0.207
   # 2.5.3-2.5.4 panic in the type-aware module resolver (biomejs/biome#10885).