Fix punctuation in quarantine policy description

Author: chrisda

exchange/exchange-ps/exchange/Set-QuarantinePolicy.md

@@ -49,7 +49,7 @@ Set-QuarantinePolicy [-Identity] <QuarantineTagIdParameter>
 ```
 
 ## DESCRIPTION
-You can't modify the built-in quarantine policies named AdminOnlyAccessPolicy, DefaultFullAccessPolicy or DefaultFullAccessWithNotificationPolicy.
+You can't modify the built-in quarantine policies named AdminOnlyAccessPolicy, DefaultFullAccessPolicy, or DefaultFullAccessWithNotificationPolicy.
 
 You need to be assigned permissions before you can run this cmdlet. Although this topic lists all parameters for the cmdlet, you may not have access to some parameters if they're not included in the permissions assigned to you. To find the permissions required to run any cmdlet or parameter in your organization, see [Find the permissions required to run any Exchange cmdlet](https://learn.microsoft.com/powershell/exchange/find-exchange-cmdlet-permissions).