feat: update AWS service endpoints metadata

Author: aws-sdk-kotlin-ci

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

@@ -5835,6 +5835,7 @@
               "tags" : [ "dualstack" ]
             } ]
           },
+          "mx-central-1" : { },
           "sa-east-1" : {
             "variants" : [ {
               "hostname" : "cognito-identity.sa-east-1.amazonaws.com",
@@ -6071,6 +6072,7 @@
               "tags" : [ "dualstack" ]
             } ]
           },
+          "mx-central-1" : { },
           "sa-east-1" : {
             "variants" : [ {
               "hostname" : "cognito-idp.sa-east-1.amazonaws.com",