workflow:add checkout parameters to fix inconsistent build failures

[RandyMcMillan]

No description provided.

[RandyMcMillan]

https://github.com/bitcoincore-dev/ldk-sample/actions/runs/7806359956/job/21292554030

[TheBlueMatt]

The error upstream was "fatal: unable to access 'https://github.com/lightningdevkit/ldk-sample/': Could not resolve host: github.com". I don't see how this fixes the error of "sorry, not connected to the internet"?

[RandyMcMillan]

I have found that if git doesn't recognize a repo as safe...it blocks requests.
So the error may be being misinterpreted by GitHub?

[TheBlueMatt]

I'm somewhat skeptical, my PR at https://github.com/lightningdevkit/ldk-sample/actions/runs/7806655220/job/21293476669?pr=129 just passed fine. We've seen github MacOS runners not have internet connectivity sporadically repeatedly in other LDK projects, though, so I think the bug actually lies on GitHub's end. Unless there's some other reference to this issue I'm not aware of.

[RandyMcMillan]

I understand your skepticism. Whenever I create a workflow - I just automatically put it in there. So it isn't even an issue.
Feel free to gank the commit and try it on other repos YOU are seeing this intermittent issue on - with no real explanation or solution.