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

@@ -1756,6 +1756,19 @@
           "us-west-2" : { }
         }
       },
+      "arc-zonal-shift" : {
+        "endpoints" : {
+          "ap-northeast-1" : { },
+          "ap-southeast-2" : { },
+          "ap-southeast-3" : { },
+          "eu-central-1" : { },
+          "eu-north-1" : { },
+          "eu-west-1" : { },
+          "us-east-1" : { },
+          "us-east-2" : { },
+          "us-west-2" : { }
+        }
+      },
       "athena" : {
         "endpoints" : {
           "af-south-1" : {