revert: undo email sender domain entitlement change in emails page

Agent-Logs-Url: https://github.com/medusajs/medusa/sessions/7821ad49-a790-4c25-bf66-38fc0b0003ce

Co-authored-by: shahednasser <27354907+shahednasser@users.noreply.github.com>

Author: Copilot

www/apps/cloud/app/emails/page.mdx

@@ -188,7 +188,7 @@ Refer to the [Set Up React Email Templates](./react-email/page.mdx) guide to lea
 
 <Note>
 
-Verified email sender domains require the "custom-domain-email" entitlement. Contact support if you need access to this feature.
+Verified email sender domains are available for Launch, Scale, and Enterprise plans only. Learn more about plan features on the [pricing page](../pricing/page.mdx).
 
 </Note>