Added a new article for zone to zone DR and made edits in other articles 2

Author: sideeksh

articles/site-recovery/azure-to-azure-how-to-enable-zone-to-zone-dr.md

@@ -23,7 +23,7 @@ Site Recovery service contributes to your business continuity and disaster recov
 
 Availability Zones are unique physical locations within an Azure region. Each zone has one or more datacenters. 
 
-## Using Availability Zones for Disaster Recovery
+## Using Availability Zones for Disaster Recovery 
 
 Typically, Availability Zones are used to deploy VMs in a High Availability configuration. They may be too close to each other to serve as a Disaster Recovery solution in case of natural disaster.