Fix CI yaml

[xyao-nv]

Summary

Fix Error: The template is not valid. .github/workflows/ci.yml (Line: 103, Col: 19): Unexpected value from CI jobs (example) for both base & GR00T dockers

[cvolkcvolk]

Thanks for looking into this!
The original failure could be another one: The MR was opened from a fork, so GitHub Actions won't expose secrets, causing the NGC credentials to be empty. I added him as a repo maintainer. That should fix it. Lets see