Update resin/raspberrypi3-alpine Docker tag to v3.8 - autoclosed

[balena-renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
resin/raspberrypi3-alpine	final	minor	3.6 -> 3.8
resin/raspberrypi3-alpine	stage	minor	3.6 -> 3.8

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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

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

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This PR has been generated by Renovate Bot.