Added Note Formatting (#9988)

Added note tags to the text

content/en/docs/tasks/administer-federation/namespaces.md

@@ -81,10 +81,9 @@ kubectl --context=federation-cluster delete ns myns
 As in Kubernetes, deleting a federated Namespace will delete all resources in that
 Namespace from the federation control plane.
 
-Note that at this point, deleting a federated Namespace will not delete the
-corresponding Namespace and resources in those Namespaces from underlying clusters.
-Users are expected to delete them manually.
-We intend to fix this in the future.
+{{< note >}}
+**Note:** At this point, deleting a federated Namespace will not delete the corresponding Namespace, or resources in those Namespaces, from underlying clusters. Users must delete them manually. We intend to fix this in the future.
+{{< /note >}}
 
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