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

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/cache	action	major	v5 → v6

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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

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Configuration

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📥 Commits

Reviewing files that changed from the base of the PR and between 06f0e4b and 1d26d04.

📒 Files selected for processing (2)

• .github/actions/artifact-cache/action.yml
• .github/workflows/agents-auto-pilot.yml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch renovate/actions-cache-6.x

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[github-actions]

Workflow state fingerprint for Agents Gate Followups. Do not edit.

[github-actions]

Workflow state fingerprint for Keepalive Loop Reporter. Do not edit.

[agents-workflows-bot]

Workflow source needed

PR #138 needs either a linked GitHub issue or one valid non-issue Workflow Source before PR metadata automation can manage it safely.

Please do one of:

• Add <!-- meta:issue:123 --> or a normal Closes #123 / Related to #123 line.
• Check one Workflow Source option in the PR body.
• Add a hidden marker such as <!-- workflow-source:local_request -->, <!-- workflow-source:manual_remote -->, <!-- workflow-source:review_followup -->, <!-- workflow-source:sync_campaign -->, or <!-- workflow-source:dependabot -->.
• Add a workflow source label such as workflow:source-direct-pr, workflow:source-local-request, workflow:source-review-followup, workflow:source-sync, or workflow:no-automation.

Once a valid source is present, this warning will not be reposted.

[stranske]

Closing as superseded by stranske/Workflows#2520 and Maint 68 run 28048623743. Direct consumer PRs for Workflows-managed actions/cache files would create ownership drift; the replacement should come from the Workflows source and sync wave.

[renovate]

Renovate Ignore Notification

Because you closed this PR without merging, Renovate will ignore this update. You will not get PRs for any future 6.x releases. But if you manually upgrade to 6.x then Renovate will re-enable minor and patch updates automatically.

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