Document snag with stringData and server-side apply

Author: pegasas

content/en/docs/tasks/configmap-secret/managing-secret-using-kubectl.md

@@ -40,6 +40,10 @@ You must use single quotes `''` to escape special characters such as `$`, `\`,
 `*`, `=`, and `!` in your strings. If you don't, your shell will interpret these
 characters.
 
+{{< note >}}
+The `stringData` field for a Secret does not work well with server-side apply.
+{{< /note >}}
+
 ### Use source files
 
 1. Store the credentials in files:

content/en/docs/tasks/configmap-secret/managing-secret-using-kustomize.md

@@ -24,6 +24,10 @@ You can generate a Secret by defining a `secretGenerator` in a
 literal values. For example, the following instructions create a Kustomization
 file for the username `admin` and the password `1f2d1e2e67df`.
 
+{{< note >}}
+The `stringData` field for a Secret does not work well with server-side apply.
+{{< /note >}}
+
 ### Create the Kustomization file
 
 {{< tabs name="Secret data" >}}