improve cronjob example with best practices

README.md

@@ -50,16 +50,23 @@ Ensure the following commands are available in the container:
 Example Kubernetes CronJob manifest for running BackupSidecar as a cron job for directory backups in minimal configuration:
 
 ```yaml
-apiVersion: batch/v1beta1
+apiVersion: batch/v1
 kind: CronJob
 metadata:
   name: backupsidecar-cron
+  namespace: authentik
 spec:
-  schedule: "0 2 * * *" # Run daily at 2:00 AM
+  schedule: "0 7 * * *"
+  concurrencyPolicy: Forbid
+  successfulJobsHistoryLimit: 5
+  failedJobsHistoryLimit: 3
   jobTemplate:
     spec:
+      backoffLimit: 3
+      activeDeadlineSeconds: 300
       template:
         spec:
+          restartPolicy: OnFailure
           containers:
             - name: backupsidecar
               image: backupsidecar:latest