Clarifying sentence.

Author: roygara

includes/virtual-machines-disks-incremental-snapshots-restrictions.md

@@ -21,6 +21,8 @@
 
 ### Incremental snapshots of Ultra Disks (preview)
 
+Incremental snapshots of Ultra Disks have the following additional restrictions:
+
 - You must request and receive access to the preview from the following link: [https://aka.ms/UltraPremiumv2SnapshotPreview](https://aka.ms/UltraPremiumv2SnapshotPreview)
 - Currently only available in Sweden Central and US West 3.
 - Snapshots with a 4096 logical sector size are stored as VHDX and can only be used to create Ultra Disks. They can't be used to create other disk types. To determine what sector size your snapshot has, see [check sector size](#check-sector-size).