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

@@ -21079,6 +21079,14 @@
  "cn-northwest-1" : { }
  }
  },
+ "acm-pca" : {
+ "defaults" : {
+ "protocols" : [ "https" ]
+ },
+ "endpoints" : {
+ "cn-north-1" : { }
+ }
+ },
  "airflow" : {
  "endpoints" : {
  "cn-north-1" : { },