README.md in lono-6.0.1 vs README.md in lono-6.1.0

@@ -52,10 +52,10 @@
   ImageId: find_in_map("AmiMap", ref("AWS::Region"), "Ami"),
   SecurityGroupIds: [get_att("SecurityGroup.GroupId")],
   UserData: base64(user_data("bootstrap.sh"))
 )
 resource("SecurityGroup", "AWS::EC2::SecurityGroup",
-  group_description: "demo security group",
+  GroupDescription: "demo security group",
 )
 
 output("Instance")
 output("SecurityGroup", get_att("SecurityGroup.GroupId"))
 ```