(AzureCXP) fixes MicrosoftDocs/azure-docs#101506

Updated line number 79
From 
 - pwsh.exe
To 
 - powershell.exe

Author: SaibabaBalapur-MSFT

articles/aks/use-windows-hpc.md

@@ -76,7 +76,7 @@ spec:
               hostProcess: true
               runAsUserName: "NT AUTHORITY\\SYSTEM"
           command:
-            - pwsh.exe
+            - powershell.exe
             - -command
             - |
               $AdminRights = ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]"Administrator")