chore(deps): update actions/checkout action to v2 - autoclosed

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v1 -> v2

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Release Notes

actions/checkout

### [`v2`](https://togithub.com/actions/checkout/blob/master/CHANGELOG.md#v231) [Compare Source](https://togithub.com/actions/checkout/compare/v1...v2) - [Fix default branch resolution for .wiki and when using SSH](https://togithub.com/actions/checkout/pull/284)

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Configuration

📅 Schedule: At any time (no schedule defined).

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

♻️ Rebasing: Whenever PR becomes conflicted, 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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