Review, revise, and add Advisory instructions to the internal docs

Create an informative issue (See each section, incomplete templates/issues won't be triaged)

Using the current documentation as a model, please complete the issue template. 

Note: Doc team updates the current version and the two previous versions (n-2). For earlier versions, we will address only high-priority, customer-reported issues for releases in support.

Prerequisite: Start with what we have

Always look at the current documentation to describe the change that is needed. Use the source or portal link for Step 4:

 - Use the Customer Portal: https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes

 - Use the GitHub link to find the staged docs in the repository: https://github.com/stolostron/rhacm-docs 

https://github.com/stolostron/rhacm-docs/tree/gh-pages/_pages

https://docs.google.com/document/d/13w3FGXCfKUNEM8dbp8HVlVLJzr6TUzvF5zy-zUJWrGA/edit?pli=1