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

@@ -10156,12 +10156,14 @@
       },
       "mediaconnect" : {
         "endpoints" : {
+          "af-south-1" : { },
           "ap-east-1" : { },
           "ap-northeast-1" : { },
           "ap-northeast-2" : { },
           "ap-south-1" : { },
           "ap-southeast-1" : { },
           "ap-southeast-2" : { },
+          "ca-central-1" : { },
           "eu-central-1" : { },
           "eu-north-1" : { },
           "eu-west-1" : { },