Update actions/checkout action to v3

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v2 -> v3

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Release Notes

actions/checkout

### [`v3`](https://togithub.com/actions/checkout/compare/v2...v3) [Compare Source](https://togithub.com/actions/checkout/compare/v2...v3)

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Configuration

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• [ ] If you want to rebase/retry this PR, click this checkbox.

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[github-actions[bot]]

Unit Test Results

19 files  ±0  19 suites  ±0   19s :stopwatch: ±0s 78 tests ±0  50 :heavy_check_mark: ±0  28 :zzz: ±0  0 :x: ±0 

Results for commit 909032d7. ± Comparison against base commit df63fa4b.