Update script description

Make it clear that the script is for Enterprise Cloud customers

Author: RamonPage

api/powershell/invite_members_to_org.ps1

@@ -5,8 +5,8 @@
 Batch invite members to an organization
 
 .DESCRIPTION
-This script runs a batch organization invitation process for a given list of GitHub enterprise
-consumed licenses.
+This script runs a batch organization invitation process for a given list of GitHub Enterprise
+Cloud consumed licenses.
 
 The input is a CSV file with a column named "Handle or email", such as can be exported from the
 Enterprise settings > Enterprise licensing page. Users with appropriate permissions can export