Update tailscale/github-action digest to 6cae46e

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
tailscale/github-action	action	digest	84a3f23 -> 6cae46e

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Configuration

📅 Schedule: Branch creation - Between 12:00 AM and 03:59 AM, only on Monday ( * 0-3 * * 1 ) in timezone America/Los_Angeles, Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ 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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