OSDOCS-12230: adding missing parameters for node procedure

Author: skopacz1

modules/adding-node-iso-configs.adoc

@@ -68,6 +68,17 @@ For more information, see "Root device hints" in the "Setting up the environment
 The configuration must match the Host Network Management API defined in the link:https://nmstate.io/[nmstate documentation].
 |A dictionary of host network configuration objects.
 
+|cpuArchitecture
+|Optional.
+Specifies the architecture of the nodes you are adding.
+This parameter allows you to override the default value from the cluster when required.
+|String.
+
+|sshKey
+|Optional.
+The file containing the SSH key to authenticate access to your cluster machines.
+|String.
+
 |====