Update endpoints model

AWS SDK for Go v2 automation user · AWS SDK for Go v2 automation user · commit c154c2c4f417 · 2022-07-28T18:10:01.000Z
diff --git a/codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/endpoints.json b/codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/endpoints.json
@@ -6299,6 +6299,7 @@
         "endpoints" : {
           "af-south-1" : { },
           "ap-northeast-2" : { },
+          "ap-southeast-1" : { },
           "ap-southeast-2" : { },
           "eu-central-1" : { },
           "eu-north-1" : { },
