Update device-enrollment-manager-enroll.md

Updated DEM initiate via Azure AD Join as it is supported per the chart - https://docs.microsoft.com/en-us/mem/intune/enrollment/enrollment-method-capab?form=MY01SV&OCID=MY01SV#capabilities-by-enrollment-method

Author: msbemba

memdocs/intune/enrollment/device-enrollment-manager-enroll.md

@@ -63,6 +63,7 @@ You can use the following methods to enroll devices using DEM accounts:
 - [Windows Autopilot](../../autopilot/enrollment-autopilot.md)
 - [Windows devices bulk enrollment](windows-bulk-enroll.md)
 - [DEM initiated via Company Portal](../user-help/use-managed-devices-to-get-work-done.md)
+- [DEM initiated via Azure AD join](/mem/intune/enrollment/device-enrollment-manager-enroll)
 
 ## Add a device enrollment manager