chore(deps-dev): bump @opencode-ai/sdk in the dev-dependencies group

Bumps the dev-dependencies group with 1 update: [@opencode-ai/sdk](https://github.com/sst/opencode-sdk-js).


Updates `@opencode-ai/sdk` from 1.18.9 to 1.18.11
- [Release notes](https://github.com/sst/opencode-sdk-js/releases)
- [Changelog](https://github.com/anomalyco/opencode-sdk-js/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sst/opencode-sdk-js/commits)

---
updated-dependencies:
- dependency-name: "@opencode-ai/sdk"
  dependency-version: 1.18.11
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
...

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Author: dependabot[bot]