Update to new PowerShell reference schema

[Saisang]

Update to new PowerShell reference schema

[learn-build-service-prod]

Learn Build status updates of commit 1723783:

✅ Validation status: passed

File	Status	Preview URL	Details
.openpublishing.publish.config.json	✅Succeeded

For more details, please refer to the build report.

[learn-build-service-prod]

Learn Build status updates of commit 9314634:

✅ Validation status: passed

File	Status	Preview URL	Details
.openpublishing.publish.config.json	✅Succeeded

For more details, please refer to the build report.

[sdwheeler]

@xmdanni What was the purpose of this PR?

[xmdanni]

@sdwheeler PowerShellCmdlet1 and PowerShellModule1 are schema names used by docfx build for PSMD2Yaml structure. The replaced names are schema for MAML2Yaml output structure.