Consider linking to resources in deprecation notices

[cnunciato]

Currently, we call out deprecated resources and their replacements, but we leave it up to users to navigate to the replacements on their own:

If we can, we should link directly to replacement resources.

[scottslowe]

@interurban Assigning to you, probably needs to go to the Docs board

[thoward]

This refers to registry docs and would happen at generation time which is out of scope for this team/repo. Transferring to registry repo.