👷‍♂️ Bump actions/checkout to v5

[rejected-l]

Bumps checkout to v5 for future-proofing against Node 24 runner updates. Requires runner v2.327.1+. Workflows compile the same.

More info: https://github.com/actions/checkout/releases/tag/v5.0.0

[Copilot]

Pull Request Overview

Updates GitHub Actions checkout action from v4 to v5 across all workflow files to prepare for future Node.js 24 runner updates and ensure compatibility with newer GitHub Actions runner versions.

• Bumps actions/checkout from v4 to v5 across all CI workflow files
• Maintains existing workflow functionality while future-proofing infrastructure
• Requires GitHub Actions runner version 2.327.1 or higher

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
.github/workflows/ci.yml	Updates checkout action version in main CI workflow across 5 job definitions
.github/workflows/ci-wake.yml	Updates checkout action version in Wake testing workflow
.github/workflows/ci-super-intense.yml	Updates checkout action version in super-intense testing workflow
.github/workflows/ci-invariant-intense.yml	Updates checkout action version in invariant-intense testing workflow
.github/workflows/ci-all-via-ir.yml	Updates checkout action version in via-ir testing workflow

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