Merge pull request #104045 from metanMSFT/metan/update-powershell

[CogSvcs] Fix for Immersive Reader PowerShell script

Author: PRMerger10

articles/cognitive-services/immersive-reader/how-to-create-immersive-reader.md

@@ -105,6 +105,10 @@ The script is designed to be flexible. It will first look for existing Immersive
             Write-Host "New service principal created successfully"
         }
 
+        # Sleep for 5 seconds to allow the new service principal to propagate
+        Write-Host "Sleeping for 5 seconds"
+        Start-Sleep -Seconds 5
+
         Write-Host "Granting service principal access to the newly created Immersive Reader resource"
         $accessResult = az role assignment create --assignee $principalId --scope $resourceId --role "Cognitive Services User"
         if (-not $accessResult) {