Update source.md

[the-praxs]

Fixed Windows path in cleanup_artifacts script portion.

Description

• Modified the path in Windows cleanup_artifacts script section to reflect Windows directory style.
• Consistency.
• No dependency change.

Checklist:

• I have adhered to the GitFlow naming convention and my branch name is in the format of feature/feature-name or hotfix/hotfix-name.
• Update our documentation following these guidelines. Update any user guides that are affected by the changes.
• Update our tests following these guidelines.
• Make sure you are following our CONTRIBUTING guidelines.
• If a feature was added make sure to add it to the corresponding integration test script.

Others

• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.

[andrewkenreich]

this is good, I was going to update this today as well after I ran through the steps this weekend

[andrewkenreich]

this works for windows - i had to do this