[Docs] Fix command to save SMTP password for email account
@@ -443,7 +443,7 @@ In order to store the account SMTP password, use the keystore command
[source,yaml]
--------------------------------------------------
-bin/elasticsearch-keystore xpack.notification.email.account.exchange_account.smtp.secure_password
+bin/elasticsearch-keystore add xpack.notification.email.account.exchange_account.smtp.secure_password
--------------------------------------------------
[float]
