Add dependabot and upgrade upload-artifacts

[MSevey]

The upload-artifact action v3 is being deprecated for v4 and will not be supported past Dec 2024.

That action needs to be bumped and I'd recommend this repo adds dependabot to avoid needing to manually catch these.

https://github.com/actions/upload-artifact/blob/main/docs/MIGRATION.md

I was updating our repos and accidentally pushed this branch when I should have made an issue here: #2772