ci: bump actions/checkout from v1 to v2

[peaceiris]

The title says it all.

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[gr2m]

thanks :)

[gr2m]

CI errors are unrelated

[welcome]

Thanks for your contribution to probot! 🎉

[timbru31]

Hehe this broke the docs publishing because the full git history is not cloned anymore ;)

[peaceiris]

@timbru31

Hehe this broke the docs publishing because the full git history is not cloned anymore ;)

This problem will be fixed by the following issue.

actions/checkout#240

And we can use the fetch-depth: 0 option to fetch all Git history.

- uses: actions/checkout@v2
  with:
    fetch-depth: 0

[timbru31]

I've already fixed/workaround-ed it via #1236 (with a clone depth of 20, which should be deep enough) - was just a FYI that this update can cause breaking changes :)

[github-actions]

🎉 This PR is included in version 9.11.4 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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