feat(clients): update client endpoints as of 2025-07-21

Author: awstools

codegen/smithy-aws-typescript-codegen/src/main/resources/software/amazon/smithy/aws/typescript/codegen/endpoints.json

@@ -6836,6 +6836,7 @@
                 }
               ]
             },
+            "mx-central-1": {},
             "sa-east-1": {
               "variants": [
                 {
@@ -7140,6 +7141,7 @@
                 }
               ]
             },
+            "mx-central-1": {},
             "sa-east-1": {
               "variants": [
                 {