Adding link to docs about encryption key cli tool (#92394) (#92682)

docs/settings/alert-action-settings.asciidoc

@@ -21,9 +21,12 @@ You can configure the following settings in the `kibana.yml` file.
 [cols="2*<"]
 |===
 
-| `xpack.encryptedSavedObjects.encryptionKey`
+| `xpack.encryptedSavedObjects`
+`.encryptionKey`
   | A string of 32 or more characters used to encrypt sensitive properties on alerts and actions before they're stored in {es}. Third party credentials &mdash; such as the username and password used to connect to an SMTP service &mdash; are an example of encrypted properties. +
   +
+  {kib} offers a <<kibana-encryption-keys, CLI tool>> to help generate this encryption key. +
+  +
   If not set, {kib} will generate a random key on startup, but all alert and action functions will be blocked. Generated keys are not allowed for alerts and actions because when a new key is generated on restart, existing encrypted data becomes inaccessible. For the same reason, alerts and actions in high-availability deployments of {kib} will behave unexpectedly if the key isn't the same on all instances of {kib}. +
   +
   Although the key can be specified in clear text in `kibana.yml`, it's recommended to store this key securely in the <<secure-settings,{kib} Keystore>>.