Fix cmdlet docs to support PlatyPS

[sdwheeler]

Fix cmdlet docs to support PlatyPS

• Fixes AB#444843

[learn-build-service-prod]

Learn Build status updates of commit 205511c:

❌ Validation status: errors

Please follow instructions here which may help to resolve issue.

File	Status	Preview URL	Details
	❌Error		Details

• Line 0, Column 0: [Error: PSMD2Yaml_InternalError] Internal Error: PowerShell script not found: C:\Program Files\docs-pipeline\Scripts\Get-InstalledPlatyPSVersion.ps1

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[learn-build-service-prod]

Learn Build status updates of commit 6a8410d:

❌ Validation status: errors

Please follow instructions here which may help to resolve issue.

File	Status	Preview URL	Details
	❌Error		Details

• Line 0, Column 0: [Error: PSMD2Yaml_InstalledVersionNotExpected] Installed version not expected: PlatyPS module (Microsoft.PowerShell.PlatyPS) is not installed.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.