ci: restore pnpm 9 install for publishing

[interstellarmt]

PR includes

• fixed #0
• add / modify test cases
• documents, demos

Screenshot

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Latest commit: 680832e

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[Copilot]

🟡 Changes recommended

The publish workflow still appears misaligned with documented/project CI conventions (Node version and tag trigger pattern), which can prevent publishing or produce inconsistent release artifacts.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

This PR updates the npm publish GitHub Actions workflow to restore the publishing install setup by switching pnpm back to v9 and relaxing the install command.

Changes:

• Set pnpm/action-setup version back to pnpm 9 in the publish workflow.
• Change dependency installation from pnpm install --frozen-lockfile to pnpm install.

File summaries

File	Description
.github/workflows/publish.yml	Restores pnpm v9 usage and adjusts install behavior in the publish pipeline.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 2
• Review effort level: Lite

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