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

@@ -5501,6 +5501,8 @@
       "emr-serverless" : {
         "endpoints" : {
           "ap-northeast-1" : { },
+          "ap-northeast-2" : { },
+          "ap-south-1" : { },
           "ap-southeast-1" : { },
           "eu-central-1" : { },
           "eu-west-1" : { },
@@ -5525,6 +5527,7 @@
             "deprecated" : true,
             "hostname" : "emr-serverless-fips.us-west-2.amazonaws.com"
           },
+          "sa-east-1" : { },
           "us-east-1" : {
             "variants" : [ {
               "hostname" : "emr-serverless-fips.us-east-1.amazonaws.com",
@@ -7481,6 +7484,10 @@
       },
       "ivschat" : {
         "endpoints" : {
+          "ap-northeast-1" : { },
+          "ap-northeast-2" : { },
+          "ap-south-1" : { },
+          "eu-central-1" : { },
           "eu-west-1" : { },
           "us-east-1" : { },
           "us-west-2" : { }