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

@@ -37516,6 +37516,12 @@
           }
         }
       },
+      "storagegateway" : {
+        "endpoints" : {
+          "us-iso-east-1" : { },
+          "us-iso-west-1" : { }
+        }
+      },
       "streams.dynamodb" : {
         "defaults" : {
           "credentialScope" : {
@@ -37844,6 +37850,11 @@
           }
         }
       },
+      "datasync" : {
+        "endpoints" : {
+          "us-isob-east-1" : { }
+        }
+      },
       "directconnect" : {
         "endpoints" : {
           "us-isob-east-1" : { }