fix issue871 where child steps in the failed Saga container do not get retried when the suspended workflow is resumed

Author: sleedtec

src/WorkflowCore/Services/ErrorHandlers/SuspendHandler.cs

@@ -29,6 +29,8 @@ public void Handle(WorkflowInstance workflow, WorkflowDefinition def, ExecutionP
                 WorkflowDefinitionId = workflow.WorkflowDefinitionId,
                 Version = workflow.Version
             });
+
+            step.PrimeForRetry(pointer);
         }
     }
 }