[windows] clarify Install-AzureModules description (#8273)

Author: ilia-shipitsin

images/win/scripts/Installers/Install-AzureModules.ps1

@@ -1,14 +1,9 @@
 ################################################################################
 ##  File:  Install-AzureModules.ps1
-##  Desc:  Install Azure PowerShell modules
+##  Desc:  PowerShell modules used by AzureFileCopy@4, AzureFileCopy@5, AzurePowerShell@4, AzurePowerShell@5 tasks
 ##  Supply chain security: package manager
 ################################################################################
 
-#
-# prepares the environment for the Azure PowerShell modules
-# used by AzureFileCopy@4, AzureFileCopy@5, AzurePowerShell@4, AzurePowerShell@5 tasks
-#
-
 # The correct Modules need to be saved in C:\Modules
 $installPSModulePath = "C:\\Modules"
 if (-not (Test-Path -LiteralPath $installPSModulePath))