Fix betaHighConfidenceTesting assignment in script

[dsn1321]

Pull Request Type

• New Script
• Edit Script
• Repository Improvement

Brief summary of changes

Changed the first occurance of $betaHighConfidenceTesting to an assignment instead of comparison.
Requirement fails since the comparison outputs "False"

Describe your Testing

Tested in autopilot on VM from modified script works to detect oobe.

Checklist

• Did you Clean your script - No environment details, comments are PG-13
• Did you test your script
• If required, did you create, and include a Read Me as outlined in Community Scripts Read Me

Notes for PMPC Team