update cHANGELOG

CHANGELOG.md

@@ -16,6 +16,9 @@ FEATURES:
       using the standard Docker API. [GH-855]
   * **New provider: `openstack` (OpenStack)** - Interact with the many resources
       provided by OpenStack. [GH-924]
+  * **New feature: `terraform_remote_state` resource** - Reference remote
+      states from other Terraform runs to use Terraform outputs as inputs
+      into another Terraform run.
   * **New command: `taint`** - Manually mark a resource as tainted, causing
       a destroy and recreate on the next plan/apply.
   * **New resource: `aws_vpn_gateway`** [GH-1137]