Clarify comment

scheduler/reconcile.go

@@ -160,6 +160,9 @@ func (a *allocReconciler) Compute() *reconcileResults {
 	// Detect if the deployment is paused
 	if a.deployment != nil {
 		// Detect if any allocs associated with this deploy have failed
+		// Failed allocations could edge trigger an evaluation before the deployment watcher
+		// runs and marks the deploy as failed. This block makes sure that is still
+		// considered a failed deploy
 		failedAllocsInDeploy := false
 		for _, as := range m {
 			for _, alloc := range as {