Update upload artifact and add option for extra repositories

[seabbs]

As the title, this PR updates the version of upload artifacts which was throwing a depreciation error for me.

I have also added a pass-through of the extra_repositories option for setup-r as our use case needs this in order to install our dependencies (I can split this off into another PR if desired).

I have this running here from my fork and it looks like everything is now working as expected: https://github.com/epinowcast/primarycensoreddist/actions/runs/10906920699?pr=79

The non-forked version is failing here with the depreciation note I mentioned: https://github.com/epinowcast/epinowcast/actions/runs/10839748687?pr=528

Thanks a lot for keeping this ticking over. We find it very useful for a lot of our work.

[lorenzwalthert]

Thanks, any objections @assignUser and @plietar?

[seabbs]

To get this fully working I had to switch out to use download-artifact in the comment action. Can see this working here: epinowcast/primarycensored#80

[assignUser]

Great to be able to remove the custom script 👍

[seabbs]

I’ve updated to include the changes from @sbfnk in #144

[lorenzwalthert]

@seabbs the PR is approved, you can merge it ;D

[seabbs]

I see only those with write access to this repository can merge this PR.

[lorenzwalthert]

Oh ok 😄.