chore: Update outdated GitHub Actions versions

[pgoslatara]

• I've opened an issue first
• This was approved by a maintainer
• Description: This PR updates outdated GitHub Action versions.
  • Updated actions/cache from v4 to v5 in .github/workflows/bun-ci.yml
  • Updated actions/checkout from v4 to v6 in .github/workflows/bun-ci.yml
• Testing: The changes will be tested in the CI pipeline of the pull request.

Summary by CodeRabbit

• Chores
  • Updated continuous integration steps for repository checkout and dependency caching to newer, more secure and compatible versions to keep CI running reliably.

[vercel]

@pgoslatara is attempting to deploy a commit to the OpenCut OSS Team on Vercel.

A member of the Team first needs to authorize it.

[netlify]

👷 Deploy request for appcut pending review.

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Name	Link
🔨 Latest commit	2f07e10

[coderabbitai]

📝 Walkthrough

Walkthrough

Updated GitHub Actions workflow versions in .github/workflows/bun-ci.yml: actions/checkout pin moved from v4 to a specific commit (v6.0.2), and actions/cache pin moved from v4 to a specific commit (v5.0.3). No other workflow logic changed.

Changes

Cohort / File(s)	Summary
GitHub Actions workflow ​.github/workflows/bun-ci.yml	Bumped action pins: actions/checkout@v4 → actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd (v6.0.2), and actions/cache@v4 → actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 (v5.0.3). No step logic changes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• feat: add Bun CI workflow for building and testing #43 — modifies the same .github/workflows/bun-ci.yml workflow and appears to have introduced or previously changed the CI workflow referenced here.

Poem

🐰 I hopped into the CI night,

Swapped two tags to make things right,
Checkout, cache — now gleam and hum,
Pipelines purr, and tests will run,
A carrot cheer for versions new! 🍃

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	The description addresses the core changes but lacks explicit issue reference and maintainer approval confirmation as required by the template.	Confirm whether an issue was opened first and whether a maintainer approved this change before proceeding, as the checklist items remain unchecked.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: updating GitHub Actions versions in the workflow file.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[gameroman]

For security reasons, I would recommend to use commit hash instead

https://e18e.dev/docs/publishing#keeping-actions-up-to-date

[pgoslatara]

For security reasons, I would recommend to use commit hash instead

https://e18e.dev/docs/publishing#keeping-actions-up-to-date

@gameroman Done!