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

@@ -6485,6 +6485,10 @@
       },
       "ivs" : {
         "endpoints" : {
+          "ap-northeast-1" : { },
+          "ap-northeast-2" : { },
+          "ap-south-1" : { },
+          "eu-central-1" : { },
           "eu-west-1" : { },
           "us-east-1" : { },
           "us-west-2" : { }