Description of problem:

Some steps in doc ’Converting to IPv4/IPv6 dual-stack networking’ only works for ipi clusters    

Version-Release number of selected component (if applicable):

https://docs.openshift.com/container-platform/latest/networking/ovn_kubernetes_network_provider/converting-to-dual-stack.html, there are steps to converting a single stack to dual-stack network. However, some steps(at least step 3 and step4, not sure if all steps or only step3 and step4)only works for ipi, not upi install.   

How reproducible:

Always    

Steps to Reproduce:

    1. Seens from the description
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Actual results:

The document should add restrictions if the steps do not work for upi install clusters   

Expected results:

Additional info: