wrap by warning shortcodes (#9114)

* wrap by warning shortcodes

* wrap by warning shortcodes (another)

content/en/docs/concepts/overview/object-management-kubectl/imperative-config.md

@@ -33,6 +33,7 @@ for details.
 
 ## How to update objects
 
+{{< warning >}}
 **Warning:** Updating objects with the `replace` command drops all
 parts of the spec not specified in the configuration file.  This
 should not be used with objects whose specs are partially managed
@@ -40,6 +41,7 @@ by the cluster, such as Services of type `LoadBalancer`, where
 the `externalIPs` field is managed independently from the configuration
 file.  Independently managed fields must be copied to the configuration
 file to prevent `replace` from dropping them.
+{{< /warning >}}
 
 You can use `kubectl replace -f` to update a live object according to a
 configuration file.
@@ -110,7 +112,9 @@ several manual steps.
 
 ## Defining controller selectors and PodTemplate labels
 
-**Warning**: Updating selectors on controllers is strongly discouraged.
+{{< warning >}}
+**Warning:** Updating selectors on controllers is strongly discouraged.
+{{< /warning >}}
 
 The recommended approach is to define a single, immutable PodTemplate label
 used only by the controller selector with no other semantic meaning.