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

@@ -11459,6 +11459,7 @@
           "ap-southeast-3" : { },
           "ap-southeast-4" : { },
           "ap-southeast-5" : { },
+          "ap-southeast-7" : { },
           "ca-central-1" : {
             "variants" : [ {
               "hostname" : "fsx-fips.ca-central-1.amazonaws.com",
@@ -11566,6 +11567,7 @@
           "il-central-1" : { },
           "me-central-1" : { },
           "me-south-1" : { },
+          "mx-central-1" : { },
           "prod-ca-central-1" : {
             "credentialScope" : {
               "region" : "ca-central-1"