Task: Fix procedure in 4.16 section - Attaching non-bootable ISO to BMH

Background
Himanshu Roy added a comment to HCIDOCS-72, 2024/06/18 8:52 AM

In the docs pr ( which has already been merged ) the "You can physically reboot the node" part is causing some confusion, and I think it should be removed. We want the reboot to happen only via - 1) Reboot annotation or 2) using the BMH.online field.