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

@@ -40662,6 +40662,11 @@
           "eusc-de-east-1" : { }
         }
       },
+      "rum" : {
+        "endpoints" : {
+          "eusc-de-east-1" : { }
+        }
+      },
       "runtime.sagemaker" : {
         "endpoints" : {
           "eusc-de-east-1" : { }