Update migrate-vm.md

Author: stefanflegg

articles/availability-zones/migrate-vm.md

@@ -32,7 +32,7 @@ To migrate to availability zone support, your VM SKUs must be available across t
 
 ## Downtime requirements
 
-Because zonal VMs are created across the availability zones, all migration options mentioned in this article require downtime during deployment because zonal VMs are created across the availability zones.
+Because zonal VMs are created across the availability zones, all migration options mentioned in this article require downtime during deployment.
 
 ## Migration Option 1: Redeployment
 
@@ -93,4 +93,4 @@ Learn more about:
 > [Regions and Availability Zones in Azure](az-overview.md)
 
 > [!div class="nextstepaction"]
-> [Azure Services that support Availability Zones](az-region.md)
+> [Azure Services that support Availability Zones](az-region.md)