chore(ci): bump actions/cache from 5 to 6

[dependabot]

Bumps actions/cache from 5 to 6.

Release notes

Sourced from actions/cache's releases.

v6.0.0

What's Changed

• Update packages, migrate to ESM by @​Samirat in actions/cache#1760

Full Changelog: actions/cache@v5...v6.0.0

v5.1.0

What's Changed

• Bump @​actions/cache to v5.1.0 - handle read-only cache access by @​jasongin in actions/cache#1775

Full Changelog: actions/cache@v5...v5.1.0

v5.0.5

What's Changed

• Update ts-http-runtime dependency by @​yacaovsnc in actions/cache#1747

Full Changelog: actions/cache@v5...v5.0.5

v5.0.4

What's Changed

• Add release instructions and update maintainer docs by @​Link- in actions/cache#1696
• Potential fix for code scanning alert no. 52: Workflow does not contain permissions by @​Link- in actions/cache#1697
• Fix workflow permissions and cleanup workflow names / formatting by @​Link- in actions/cache#1699
• docs: Update examples to use the latest version by @​XZTDean in actions/cache#1690
• Fix proxy integration tests by @​Link- in actions/cache#1701
• Fix cache key in examples.md for bun.lock by @​RyPeck in actions/cache#1722
• Update dependencies & patch security vulnerabilities by @​Link- in actions/cache#1738

New Contributors

• @​XZTDean made their first contribution in actions/cache#1690
• @​RyPeck made their first contribution in actions/cache#1722

Full Changelog: actions/cache@v5...v5.0.4

v5.0.3

What's Changed

• Bump @actions/cache to v5.0.5 (Resolves: https://github.com/actions/cache/security/dependabot/33)
• Bump @actions/core to v2.0.3

Full Changelog: actions/cache@v5...v5.0.3

v.5.0.2

v5.0.2

What's Changed

... (truncated)

Changelog

Sourced from actions/cache's changelog.

Releases

How to prepare a release

[!NOTE] Relevant for maintainers with write access only.

1. Switch to a new branch from main.
2. Run npm test to ensure all tests are passing.
3. Update the version in https://github.com/actions/cache/blob/main/package.json.
4. Run npm run build to update the compiled files.
5. Update this https://github.com/actions/cache/blob/main/RELEASES.md with the new version and changes in the ## Changelog section.
6. Run licensed cache to update the license report.
7. Run licensed status and resolve any warnings by updating the https://github.com/actions/cache/blob/main/.licensed.yml file with the exceptions.
8. Commit your changes and push your branch upstream.
9. Open a pull request against main and get it reviewed and merged.
10. Draft a new release https://github.com/actions/cache/releases use the same version number used in package.json
    1. Create a new tag with the version number.
    2. Auto generate release notes and update them to match the changes you made in RELEASES.md.
    3. Toggle the set as the latest release option.
    4. Publish the release.
11. Navigate to https://github.com/actions/cache/actions/workflows/release-new-action-version.yml
    1. There should be a workflow run queued with the same version number.
    2. Approve the run to publish the new version and update the major tags for this action.

Changelog

6.1.0

• Bump @actions/cache to v6.1.0 to pick up actions/toolkit#2435 Handle cache write error due to read-only token
• Switch redundant "Cache save failed" warning to debug log in save-only

6.0.0

• Updated @actions/cache to ^6.0.1, @actions/core to ^3.0.1, @actions/exec to ^3.0.0, @actions/io to ^3.0.2
• Migrated to ESM module system
• Upgraded Jest to v30 and test infrastructure to be ESM compatible

5.0.4

• Bump minimatch to v3.1.5 (fixes ReDoS via globstar patterns)
• Bump undici to v6.24.1 (WebSocket decompression bomb protection, header validation fixes)
• Bump fast-xml-parser to v5.5.6

5.0.3

• Bump @actions/cache to v5.0.5 (Resolves: https://github.com/actions/cache/security/dependabot/33)
• Bump @actions/core to v2.0.3

5.0.2

... (truncated)

Commits

• 55cc834 Merge pull request #1768 from jasongin/readonly-cache
• d8cd72f Bump @​actions/cache to v6.1.0 - handle cache write error due to RO token
• 2c8a9bd Merge pull request #1760 from actions/samirat/esm_migration_and_package_update
• e9b91fd Prettier fixes
• e4884b8 Rebuild dist
• 10baf01 Fixed licenses
• e39b386 Fix test mock return order
• b692820 PR feedback
• 6074912 Rebuild dist bundles as ESM to match type:module
• 5a912e8 Fix lint and jest issues
• Additional commits viewable in compare view

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[github-actions]

AI Analysis

Technical Summary

This pull request updates the GitHub Actions dependency actions/cache from version 5 to version 6. The upgrade incorporates several key changes and improvements documented in the actions/cache release notes and changelog.

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Technical Requirements and Constraints

• The package has migrated from CommonJS to ES Modules (ESM) starting with v6.0.0. This implies that any workflows or custom code interacting programmatically with actions/cache must be compatible with ESM.
• Dependencies such as @actions/core, @actions/exec, and @actions/io were also upgraded to their respective versions supporting ESM.
• Jest testing framework was updated to version 30 to support ESM-compatible testing.
• Cache operations now handle read-only token scenarios gracefully to avoid errors on cache write attempts (introduced in v6.1.0).
• The upgrade may involve modifications to pipeline configurations if the cache action syntax or options have changed due to the ESM

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This summary was automatically generated by AI to help with triage and may not be 100% accurate.

Suggested Labels: test

[karlspace]

Major bump, but the changelog for v6.0.0 lists exactly one change: "Update packages, migrate to ESM". No input, output or cache-key semantics changed, so nothing in our usage has to adapt.

Scope: .github/workflows/build.yml — the "💾 Cache CustomPiOS checkout" step only.

Breaking changes: none that reach us. The major is an internal ESM migration; upstream still ships v5.1.0 alongside v6.1.0, so this is not a forced move.

Compatibility check: our usage is path + key, with restore-keys deliberately absent since the CustomPiOS pin work. Both inputs are unchanged in v6.

CI: GitGuardian and the AI summary are green. Note that 📦 Build Image does not run on this PR — build.yml carries paths-ignore: .github/**, so a workflow-only change never triggers it. The bump is therefore not exercised by CI here; I am dispatching a build on main after the merge to confirm the cache step still resolves.

Related: #12 and #14 touch the same file. Merging these sequentially and re-checking mergeability in between.