[ci] Update GitHub Actions to latest major revision

[gruenich]

Fix Node.js 20 deprecation warning.
Fix CodeQL that is only working with its Action v3.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: edc28961-78e6-47c5-9a7c-c5778fe4f75a

📥 Commits

Reviewing files that changed from the base of the PR and between 278644e and 8afdd20.

📒 Files selected for processing (3)

• .github/workflows/codeql.yml
• .github/workflows/docker-build.yml
• .github/workflows/pages.yml

Included review availability: Your plan provides up to 4 included reviews per hour; 3 remain after this review.

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📝 Summary

Summary by CodeRabbit

• Chores
  • Updated automated security scanning workflows to use newer action versions.
  • Updated container build workflows with the latest checkout tooling.
  • Refreshed GitHub Pages deployment workflows, including checkout and artifact publishing actions.
  • Improved the currency and reliability of automation supporting security checks, container builds, and site publishing.

Walkthrough

The pull request updates action versions in the CodeQL, Docker build, and Pages workflows. It changes checkout, CodeQL, and Pages artifact actions without changing workflow logic.

Changes

GitHub Actions version updates

Layer / File(s)	Summary
Update workflow action versions .github/workflows/codeql.yml, .github/workflows/docker-build.yml, .github/workflows/pages.yml	The workflows upgrade checkout actions, CodeQL actions from v2 to v3, and the Pages artifact action from v4 to v5.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 8afdd

No actionable merge-blocking issue is supported by the supplied changes.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: updating GitHub Actions to newer major revisions.
Description check	✅ Passed	The description explains that the updates address the Node.js 20 deprecation warning and CodeQL Action v3 requirements.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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.

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