add the information about the new label

content/en/docs/reference/labels-annotations-taints/_index.md

@@ -1223,6 +1223,21 @@ Note the [PodIndexLabel](/docs/reference/command-line-tools-reference/feature-ga
 feature gate must be enabled for this to be added as a pod **label**,
 otherwise it will just be an annotation.
 
+### batch.kubernetes.io/managed-by {#jobkubernetesiomanaged-by}
+
+Type: Label
+
+Example: `batch.kubernetes.io/managed-by: "controller"`
+
+Used on: Jobs
+
+This label indicates the controller that manages a Job. Jobs with a custom value
+of this label - any label value other than `job-controller.k8s.io` - are
+skipped by the job controller, and their reconciliation is delegated to
+an external controller, indicated by the value of the label. Jobs that
+don't have this label at all or where the label value is the reserved
+string `job-controller.k8s.io`, are reconciled by the built-in job controller.
+
 ### batch.kubernetes.io/cronjob-scheduled-timestamp
 
 Type: Annotation