Updated target label for sealed secret controller when restoring from…

… backup

Signed-off-by: Leon Seng <[email protected]>

README.md

@@ -743,7 +743,7 @@ To restore from a backup after some disaster, just put that secrets back before
 
 ```bash
 kubectl apply -f main.key
-kubectl delete pod -n kube-system -l name=sealed-secrets-controller
+kubectl delete pod -n kube-system -l app.kubernetes.io/name=sealed-secrets
 ```
 
 ### Can I decrypt my secrets offline with a backup key?