Update endpoints model

Author: AWS SDK for Go v2 automation user

codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/endpoints.json

@@ -17210,6 +17210,17 @@
           }
         }
       },
+      "thinclient" : {
+        "endpoints" : {
+          "ap-south-1" : { },
+          "ca-central-1" : { },
+          "eu-central-1" : { },
+          "eu-west-1" : { },
+          "eu-west-2" : { },
+          "us-east-1" : { },
+          "us-west-2" : { }
+        }
+      },
       "tnb" : {
         "endpoints" : {
           "ap-northeast-2" : { },