Docs: Update Node version in CI examples

[cjeonguk]

What I did

Updated Node.js version from 20 to 24 in GitHub Actions code snippets of Publish Storybook | Storybook docs.

Node.js 20 actions are deprecated - GitHub Blog

Checklist for Contributors

Testing

Manual testing

1. Chromatic: Checked official docs of Chromatic GH Actions support Node.js 24
2. GH Pages: Official GH Actions support Node.js 24

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli-storybook/src/sandbox-templates.ts

• Make sure this PR contains one of the labels below:

  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.
  • cleanup: Minor cleanup style change. Will not show up in release changelog.
  • documentation: Documentation only changes. Will not show up in release changelog.
  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
  • other: Changes that don't fit in the above categories.

🦋 Canary release

This PR does not have a canary release associated. You can request a canary release of this pull request by mentioning the @storybookjs/core team here.

core team members can create a canary release here or locally with gh workflow run --repo storybookjs/storybook publish.yml --field pr=<PR_NUMBER>

Summary by CodeRabbit

• Documentation
  • Updated GitHub Actions workflow examples to use Node.js 24 instead of 20.
  • Updated core GitHub Actions referenced in the examples to newer versions for improved compatibility.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 68bc1151-0496-4d40-b600-175e3606c605

📥 Commits

Reviewing files that changed from the base of the PR and between ac322c2 and 8cf4176.

📒 Files selected for processing (2)

• docs/_snippets/chromatic-github-action.md
• docs/_snippets/ghp-github-action.md

✅ Files skipped from review due to trivial changes (1)

• docs/_snippets/ghp-github-action.md

🚧 Files skipped from review as they are similar to previous changes (1)

• docs/_snippets/chromatic-github-action.md

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📝 Walkthrough

Walkthrough

Updated two GitHub Actions workflow snippet files to bump third-party action versions (actions/checkout, actions/setup-node) and change the configured Node.js runtime from 20 to 24.

Changes

Cohort / File(s)	Summary
Workflow snippet updates docs/_snippets/chromatic-github-action.md, docs/_snippets/ghp-github-action.md	Bumped actions/checkout from @v4 → @v6 and actions/setup-node from @v4 → @v6; updated node-version from 20 → 24 in setup-node steps. No other workflow steps changed.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• Docs: Remove external action from Github pages documentation #32974: Modifies the same ghp-github-action.md snippet’s Node/setup-node configuration and restructures the workflow.

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[jonniebigodes]

@cjeonguk thanks for taking the time to put together this pull request and helping us improve the documentation. We appreciate it 🙏 ! I left a small item for you to look into when you can.

Let me know and we'll go from there.

Have a great day

Stay safe