fix: Bump actions/github-script from v7 to v8 for Node.js 24

[sbouchet]

What does this PR do?

Node.js 20 is deprecated on GitHub Actions runners. This was the last remaining action targeting Node.js 20.

What issues does this PR fix?

leftover of #714

How to test this PR?

Does this PR contain changes that override default upstream Code-OSS behavior?

• the PR contains changes in the code folder (you can skip it if your changes are placed in a che extension )
• the corresponding items were added to the CHANGELOG.md file
• rules for automatic git rebase were added to the .rebase folder

Summary by CodeRabbit

• Chores
  • Updated the pull request publishing workflow’s comment action to a newer version.
  • No changes to the workflow’s behavior or end-user functionality.

[github-actions]

Click here to review and test in web IDE:

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 5a0bb221-1e0a-4504-879d-a614c0d0ca5f

📥 Commits

Reviewing files that changed from the base of the PR and between 70ba2e7 and 82f45d6.

📒 Files selected for processing (1)

• .github/workflows/pull-request-check-publish.yml

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📝 Walkthrough

Walkthrough

The pull request workflow updates the PR comment step from actions/github-script@v7 to actions/github-script@v8. No other workflow behavior or public declarations change.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: rgrunber, azatsarynnyy, vitaliy-guliy, romannikitenko

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title is concise, uses imperative wording, and clearly describes the upgrade from actions/github-script v7 to v8.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Rebase Rules For Upstream Changes	✅ Passed	The PR changes only .github/workflows/pull-request-check-publish.yml; no files under code/ are changed, so rebase rules and changelog updates are not required.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[github-actions]

Pull Request images published ✨

Editor amd64: quay.io/che-incubator-pull-requests/che-code:pr-787-amd64
Editor arm64: quay.io/che-incubator-pull-requests/che-code:pr-787-arm64
Dev image: quay.io/che-incubator-pull-requests/che-code-dev:pr-787-dev-amd64