Fix sync period (really now)

Author: Trojaner

Rocket.UnityEngine/Scheduling/UnityTaskScheduler.cs

@@ -125,7 +125,7 @@ public virtual void Update()
             var cpy = Tasks.ToList(); // we need a copy because the task list may be modified at runtime
             foreach (ITask task in cpy.Where(c => !c.IsFinished && !c.IsCancelled))
             {
-                if(task.Period == null && task.ExecutionTarget != ExecutionTargetContext.Sync) 
+                if(task.Period == null || (task.Period != null  && task.ExecutionTarget != ExecutionTargetContext.Sync)) 
                     if (task.ExecutionTarget != ExecutionTargetContext.EveryFrame
                         && task.ExecutionTarget != ExecutionTargetContext.NextFrame)
                         continue;