feat: update AWS service endpoints metadata

Author: aws-sdk-kotlin-ci

codegen/aws-sdk-codegen/src/main/resources/aws/sdk/kotlin/codegen/endpoints.json

@@ -544,6 +544,7 @@
       "aoss" : {
         "endpoints" : {
           "ap-northeast-1" : { },
+          "ap-south-1" : { },
           "ap-southeast-1" : { },
           "ap-southeast-2" : { },
           "eu-central-1" : { },