Add 0.19 release note for PR cloud prepare #1007

Signed-off-by: Aswin Suryanarayanan <[email protected]>

src/content/community/releases/_index.en.md

@@ -14,6 +14,7 @@ weight = 40
   per service via the `lighthouse.submariner.io/use-clusterset-ip` annotation on the `ServiceExport` or automatically for all services via
   the `enable-clusterset-ip` option on `subctl deploy-broker`. Note that while DNS queries will return the cluster set virtual IP,
   Service Discovery does not route this virtual IP and relies on some external component to do so.
+* New options were added to `subctl cloud prepare` to support a custom vpc for AWS.
 
 ### Other changes