chore: CI checkout order update

[zepfred]

Description of the change

The order in which the quickstart source is checked out has been updated in this PR.

Checklist

Development

• [ ] The changes have been covered with tests, if necessary.
• [ ] You have a green build, with the exception of the flaky tests.
• [ ] UI and JS files are fully tested, the user interface works for all modules affected by your changes (e.g., solve and analyze buttons).
• [ ] The network calls work for all modules affected by your changes (e.g., solving a problem).
• [ ] The console messages are validated for all modules affected by your changes.

Code Review

• [ ] This pull request includes an explanatory title and description.
• [ ] The GitHub issue is linked.
• [ ] At least one other engineer has approved the changes.
• [ ] After PR is merged, inform the reporter.