fix(plugin-sass): pin sass-embedded to 1.89.0

[chenjiahan]

Summary

Pin sass-embedded to 1.89.0 to fix the Package subpath './codegenv2' is not defined by "exports" in //node_modules/.pnpm/sass-embedded@1.89.1/node_modules/@bufbuild/protobuf/package.json error.

Related Links

• https://github.com/rspack-contrib/rsbuild-ecosystem-ci/actions/runs/15457286218/job/43511757744
• [BUG] Regression in v1.89.1 : Package subpath './codegenv2' is not defined by "exports" sass/embedded-host-node#375
• "sass-embedded": "1.89.0" works... "sass-embedded": "1.89.1" not! sass/embedded-host-node#377

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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[Copilot]

Pull Request Overview

Pin the sass-embedded dependency to version 1.89.0 to avoid the missing subpath export error in downstream tooling.

• Changed sass-embedded version specifier from ^1.89.1 to an exact 1.89.0
• Ensures consistency in CI by avoiding unintended upstream patch releases

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

Comments suppressed due to low confidence (1)

packages/plugin-sass/package.json:37

• Remember to update the lockfile (e.g., pnpm-lock.yaml) so that the pinned version is preserved across installs.

    "sass-embedded": "1.89.0"