Enhance the Acquia DAM domain suggestion by incorporating the permitted pattern

Problem/Motivation

The current domain suggestion indicates "http://demo.acquiadam.com". However, we should revise this to only include examples of permitted domains, such as ".acquiadam.com" or ".widencollective.com". Including additional domains can lead to complications.

Proposed resolution

Update the help text for domain with ".acquiadam.com" or ".widencollective.com"