ci: update GitHub Actions to latest major versions

[calthejuggler]

Updates all first-party GitHub Actions to their latest major versions.

Action	Was	Now
actions/checkout	v4	v7
actions/setup-node	v4	v7
actions/github-script	v7	v9

signcl/docsearch-scraper-action@master left as-is — third-party action pinned to a branch, no semver tag to bump.

Breaking change review

Checked each changelog against our actual usage — none of the breaking changes apply:

• checkout v5/v6/v7: Node 24 runtime (runner requirement met by ubuntu-latest); v7's fork-PR block only affects pull_request_target/workflow_run, which we don't use.
• setup-node v5: auto-caching triggers on a packageManager field in package.json — we have none, so no behavior change.
• github-script v9: ESM migration drops require('@actions/github') and injects getOctokit. Our combine-prs.yml script uses only the injected github client (github.paginate, github.graphql, github.rest.*) — unaffected.

Note: feature/docsearch-on-deploy-plugin also has these actions at the old versions and touches the same workflow files. It'll hit a trivial version conflict on merge — take the bumped versions.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Updated automated build and deployment workflows to use newer versions of repository checkout, Node.js setup, and GitHub scripting tools.
  • No user-facing functionality or behaviour has changed.

[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: ee2b795e-35e6-4373-af84-75c38419f9b3

📥 Commits

Reviewing files that changed from the base of the PR and between 76709be and af0e7d8.

📒 Files selected for processing (3)

• .github/workflows/algolia.yml
• .github/workflows/build.yml
• .github/workflows/combine-prs.yml

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Walkthrough

Three GitHub Actions workflows update action versions: checkout changes to v7, setup-node changes to v7, and github-script changes to v9. Existing workflow steps and embedded logic remain unchanged.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Suggested reviewers: bmsilva, marcio-absmartly, mario-silva

Poem

A rabbit hops through workflow lines,
Updating actions, neat and fine.
Checkout seven, scripts now nine,
Node setup follows the sign.
“All done!” says Bun, with a cheerful shine.

🚥 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 clearly describes the main change: upgrading GitHub Actions to newer major versions.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/update-gh-actions

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_{Comment @coderabbitai help to get the list of available commands.}

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