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

@@ -8470,6 +8470,7 @@
           "eu-west-1" : { },
           "eu-west-2" : { },
           "eu-west-3" : { },
+          "me-central-1" : { },
           "me-south-1" : { },
           "sa-east-1" : { },
           "us-east-1" : { },