Update release-notes.md

Added kube version.

Author: ahh-docker

ee/ucp/release-notes.md

@@ -23,7 +23,7 @@ upgrade your installation to the latest release.
 
 ## 3.1.1 (2018-12-04)
 
-* Addressed CVE-2018-1002105, a critical security issue in the Kubernetes API Server.
+* To address CVE-2018-1002105, a critical security issue in the Kubernetes API Server, Docker is using Kubernetes 1.11.5 for UCP 3.1.1.
 
 ## 3.1.0 (2018-11-08)
 
@@ -119,7 +119,7 @@ The following features are deprecated in UCP 3.1.
 
 ## 3.0.7 (2018-12-04)
 
-* Addressed CVE-2018-1002105, a critical security issue in the Kubernetes API Server.
+* To address CVE-2018-1002105, a critical security issue in the Kubernetes API Server, Docker is using a custom build of Kubernetes 1.8.15 for UCP 3.0.7.
 
 ## 3.0.6 (2018-10-25)