[enhancement] fix comment error for function isJobFailed of broadcast…

…job (#1348)

Signed-off-by: Colvin-Y <ykwhrimfaxi@gmail.com>

pkg/controller/broadcastjob/broadcastjob_controller.go

@@ -493,7 +493,7 @@ func isJobComplete(job *appsv1alpha1.BroadcastJob, desiredNodes map[string]*core
 	return true
 }
 
-// isJobFailed checks if the job CompletionPolicy is not Never, and it has past the backofflimit or ActiveDeadlineSeconds.
+// isJobFailed checks if the job CompletionPolicy is not Never, and it has past ActiveDeadlineSeconds.
 func isJobFailed(job *appsv1alpha1.BroadcastJob, pods []*corev1.Pod) (bool, string, string) {
 	if job.Spec.CompletionPolicy.Type == appsv1alpha1.Never {
 		return false, "", ""