fix: Change "principle" to "principal".

Author: adyavanapalli

docs/sql-server/azure-arc/connect-at-scale.md

@@ -46,7 +46,7 @@ Each machine must have [Azure PowerShell](/powershell/azure/install-az-ps) insta
     $sp
     ```
 
-2. Give the service principle permissions to access Microsoft Graph.
+2. Give the service principal permissions to access Microsoft Graph.
 
    > [!NOTE]
    > - When you create a service principal, your account must be an Owner or User Access Administrator in the subscription that you want to use for onboarding. If you don't have sufficient permissions to create role assignments, the service principal might be created, but it won't be able to onboard machines. The instructions on how to create a custom role are provided in [Required permissions](overview.md#required-permissions).