fix missing quotes

Author: RedZephyr13

memdocs/configmgr/develop/reference/core/servers/configure/sms_packagetoadvert_a-server-wmi-class.md

@@ -1,7 +1,7 @@
 ---
 title: "SMS_PackageToAdvert_a Class"
 titleSuffix: "Configuration Manager"
-description: "The SMS_PackageToAdvert_a WMI class is an SMS Provider server class that relates an SMS_Advertisement Server WMI Class object to the SMS_Package Server WMI Class object that it advertises.
+description: "The SMS_PackageToAdvert_a WMI class is an SMS Provider server class that relates an SMS_Advertisement Server WMI Class object to the SMS_Package Server WMI Class object that it advertises."
 ms.date: "09/20/2016"
 ms.prod: "configuration-manager"
 ms.technology: configmgr-sdk