chore(deps): update actions/cache action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	Pending
actions/cache	action	major	v5.0.5 → v6.0.0	v6.1.0

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Release Notes

actions/cache (actions/cache)

v6.0.0

Compare Source

What's Changed

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

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

v6

Compare Source

v5.1.0

Compare Source

What's Changed

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

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

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Configuration

📅 Schedule: (in timezone UTC)

• Branch creation
  • "before 6am on monday"
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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[aptu-dev]

Aptu Review

✅ Approve — This PR updates the actions/cache GitHub Action from v5.0.5 to v6.0.0 in the CI workflow. The major version bump includes a migration to ESM, which is standard for modern GitHub Actions.

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_{Posted by aptu}

[aptu-dev]

Aptu Review

✅ Approve — Updates the actions/cache GitHub Action from v5.0.5 to v6.0.0 in the CI workflow. This major version update includes a migration to ESM and dependency updates.

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_{Posted by aptu}