Domains: Update DNS setup required language to be more user-friendly #3004907

Changes proposed in this Pull Request

• Average user probably doesn’t know what DNS means right off. We can make this language more user-friendly with a quick copy update.

Before

After

Testing instructions

• Switch to this PR.
• Add a subdomain to a domain that is not yet set up properly. You can add any random domain to an account to do this (and just don’t set up any DNS for it).
• Note the copy changes.

Fixes #39939