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

@@ -1634,6 +1634,18 @@
           }
         }
       },
+      "billingconductor" : {
+        "endpoints" : {
+          "aws-global" : {
+            "credentialScope" : {
+              "region" : "us-east-1"
+            },
+            "hostname" : "billingconductor.us-east-1.amazonaws.com"
+          }
+        },
+        "isRegionalized" : false,
+        "partitionEndpoint" : "aws-global"
+      },
       "braket" : {
         "endpoints" : {
           "eu-west-2" : { },
@@ -12863,6 +12875,7 @@
           "ap-south-1" : { },
           "ap-southeast-1" : { },
           "ap-southeast-2" : { },
+          "ap-southeast-3" : { },
           "ca-central-1" : { },
           "eu-central-1" : { },
           "eu-north-1" : { },