Add github actions to the dependabot.yml

[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 github actions to the dependabot to avoid needing to manually catch these.

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

[julienrbrt]

@auricom could you have a look?

[julienrbrt]

We have already added github action to dependabot, but as we needed to migrate we skipped it. I guess now it is time to migrate if the current version will stop working. Thanks for letting us know.