CI: Update GitHub Action "checkout" to v3

lostisland / faraday

Simple, but flexible HTTP client library, with support for multiple backends.

https://lostisland.github.io/faraday

MIT License

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Closed olleolleolle closed 2 years ago

olleolleolle commented 2 years ago

This PR updates the CI configuration, to use the latest GitHub Action for "checkouts".