updated description for image

example-projects/counter-demo/aws-cloudformation/cloudcomp-counter-demo.json

@@ -4,7 +4,7 @@
     "paramImageID": {
       "Type": "AWS::EC2::Image::Id",
       "Default": "ami-f573e19a",
-      "Description": "Amazon Image ID"
+      "Description": "Amazon Image ID (Amazon Linux), Frankfurt ami-f573e19a, N. Virginia ami-4dd18837"
     },
     "paramInstanceType": {
       "Type": "String",