Update app-only-auth-powershell-v2.md

Author: dariomws

exchange/docs-conceptual/app-only-auth-powershell-v2.md

@@ -137,7 +137,7 @@ You need to assign the API permission `Exchange.ManageAsApp` so the application
 
 Create a self-signed x.509 certificate using one of the following methods:
 
-- Use the [New-SelfSignedCertificate](https://docs.microsoft.com/powershell/module/pkiclient/new-selfsignedcertificate) and [Export-PfxCertificate](https://docs.microsoft.com/powershell/module/pkiclient/export-pfxcertificate) cmdlets to request a self-signed certificate and export it to PFX. (Recommended.)
+- (Recommended) Use the [New-SelfSignedCertificate](https://docs.microsoft.com/powershell/module/pkiclient/new-selfsignedcertificate) and [Export-PfxCertificate](https://docs.microsoft.com/powershell/module/pkiclient/export-pfxcertificate) cmdlets to request a self-signed certificate and export it to PFX.
 
 - Use the [Create-SelfSignedCertificate script](https://github.com/SharePoint/PnP-Partner-Pack/blob/master/scripts/Create-SelfSignedCertificate.ps1):