Merge pull request #70958 from amolnar-rh/OCPBUGS-17499-fix

OCPBUGS-17499: Add iDRAC9 prereq for ISO boot via Redfish API

Author: mburke5678

modules/install-booting-from-an-iso-over-http-redfish.adoc

@@ -21,6 +21,7 @@ Ensure that you have the latest firmware version of iDRAC that is compatible wit
 .Prerequisites
 
 * Download the installation {op-system-first} ISO.
+* Use a Dell PowerEdge server that is compatible with iDRAC9.
 
 .Procedure