fix: update PolicyId parameter set from ByPolicy to (All)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: juanoriana

sharepoint/sharepoint-ps/Microsoft.Online.SharePoint.PowerShell/Get-SPOServicePrioritizationAppRegistrations.md

@@ -56,7 +56,7 @@ When omitted, all app registrations for the tenant are returned.
 
 ```yaml
 Type: Guid
-Parameter Sets: ByPolicy
+Parameter Sets: (All)
 Aliases:
 
 Required: False