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

@@ -12610,6 +12610,7 @@
           "ap-southeast-3" : { },
           "ap-southeast-4" : { },
           "ap-southeast-5" : { },
+          "ap-southeast-7" : { },
           "ca-central-1" : { },
           "ca-west-1" : { },
           "eu-central-1" : { },
@@ -38387,6 +38388,11 @@
           }
         }
       },
+      "securityhub" : {
+        "endpoints" : {
+          "us-isob-east-1" : { }
+        }
+      },
       "servicediscovery" : {
         "endpoints" : {
           "us-isob-east-1" : { }