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

@@ -12182,13 +12182,16 @@
           "ap-northeast-2" : { },
           "ap-northeast-3" : { },
           "ap-south-1" : { },
+          "ap-south-2" : { },
           "ap-southeast-1" : { },
           "ap-southeast-2" : { },
           "ap-southeast-3" : { },
           "ca-central-1" : { },
           "eu-central-1" : { },
+          "eu-central-2" : { },
           "eu-north-1" : { },
           "eu-south-1" : { },
+          "eu-south-2" : { },
           "eu-west-1" : { },
           "eu-west-2" : { },
           "eu-west-3" : { },
@@ -19559,6 +19562,12 @@
           "cn-northwest-1" : { }
         }
       },
+      "sso" : {
+        "endpoints" : {
+          "cn-north-1" : { },
+          "cn-northwest-1" : { }
+        }
+      },
       "states" : {
         "endpoints" : {
           "cn-north-1" : { },