APIs: include information on the possible remainder

### Contributions

- [ ] I have read the contribution docs, and understand what's expected of me.

### Link to the page on docs.getdbt.com requiring updates

https://docs.getdbt.com/dbt-cloud/api-v2#/operations/Retrieve%20Job%20Artifact

### What part(s) of the page would you like to see updated?

we should include information on the possible remainder (which I think may be manifest.json, run_results.json, catalog.json ??) values for the [retrieve artifacts endpoint](https://docs.getdbt.com/dbt-cloud/api-v2#/operations/Retrieve%20Job%20Artifact). Not sure how this one may be different from run artifacts, but maybe it's new

### Additional information

_No response_