Rename dbtcloud_project_artefacts to dbtcloud_project_artifacts

[b-per]

We should stick to the American spelling

[BrettMoan]

Came to github issues to raise a bug for the typo of artifacts misspelled as artefacts.

Left learning that the spelling artefacts is actually the original British English spelling.

[b-per]

Renaming resources is a bit of a pain in Terraform as it will require people to change their configs/modules and update their state but as I don't expect this one to be widely used, I might consider it.

[will-sargent-dbtlabs]

@b-per I'm with you. I think as we see folks at scale start to really adopt this, it would be better if the spelling matches dbt clouds spelling for the rest endpoints..

[github-actions]

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[b-per]

I will actually deprecate the resource and remove it entirely.

The need to set the default jobs for docs and source freshness doesn't exist anymore with dbt Explorer.