Fixing build docs yaml to detect branches on forks

[KasukabeDefenceForce]

:pencil: Description

Type: :beetle: bugfix The build docs yaml currently clones only the main repository but we are updating it to work on branches on forks.

:pushpin: Resources

Examples, notebooks, and links to useful references.

:vertical_traffic_light: Testing

How did you test these changes?

• [ ] Testing pipeline
• [ ] Other method (describe)
• [ ] My changes can't be tested (explain why)

:ballot_box_with_check: Checklist

• [ ] I requested two reviewers for this pull request
• [ ] I updated the documentation according to my changes
• [ ] I built the documentation by applying the build_docs label

Note: If you are not allowed to perform any of these actions, ping (@) a contributor.