Update endpoints model

Author: aws-sdk-swift-automation

codegen/sdk-codegen/sdk-endpoints.json

@@ -18967,6 +18967,7 @@
             },
             "hostname" : "portal.sso.ap-southeast-5.amazonaws.com"
           },
+          "ap-southeast-7" : { },
           "ca-central-1" : {
             "credentialScope" : {
               "region" : "ca-central-1"
@@ -19045,6 +19046,7 @@
             },
             "hostname" : "portal.sso.me-south-1.amazonaws.com"
           },
+          "mx-central-1" : { },
           "sa-east-1" : {
             "credentialScope" : {
               "region" : "sa-east-1"