Correct the description of Run with PowerShell feature

[sdwheeler]

PR Summary

Correct the description of Run with PowerShell feature

• Fixes AB#47574
• Fixes about_Run_With_PowerShell page says the script will be run with pwsh.exe, but it really uses powershell.exe #12234

PR Checklist

• Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• Summary: This PR's summary describes the scope and intent of the change.
• Contributor's Guide: I have read the contributor's guide.
• Style: This PR adheres to the style guide.

[learn-build-service-prod]

Learn Build status updates of commit 5e08156:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Core/About/about_Run_With_PowerShell.md	✅Succeeded	View (powershell-5.1)
reference/7.4/Microsoft.PowerShell.Core/About/about_Run_With_PowerShell.md	✅Succeeded	View (powershell-7.4)
reference/7.5/Microsoft.PowerShell.Core/About/about_Run_With_PowerShell.md	✅Succeeded	View (powershell-7.5)
reference/7.5/Microsoft.PowerShell.Utility/ConvertFrom-SddlString.md	✅Succeeded	View (powershell-7.5)
reference/7.6/Microsoft.PowerShell.Core/About/about_Run_With_PowerShell.md	✅Succeeded	View (powershell-7.6)

For more details, please refer to the build report.

[learn-build-service-prod]

Learn Build status updates of commit 5b2c0c6:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Core/About/about_Run_With_PowerShell.md	✅Succeeded	View (powershell-5.1)
reference/7.4/Microsoft.PowerShell.Core/About/about_Run_With_PowerShell.md	✅Succeeded	View (powershell-7.4)
reference/7.5/Microsoft.PowerShell.Core/About/about_Run_With_PowerShell.md	✅Succeeded	View (powershell-7.5)
reference/7.5/Microsoft.PowerShell.Utility/ConvertFrom-SddlString.md	✅Succeeded	View (powershell-7.5)
reference/7.6/Microsoft.PowerShell.Core/About/about_Run_With_PowerShell.md	✅Succeeded	View (powershell-7.6)

For more details, please refer to the build report.