docs(email): show the create-account form in the Email Accounts screenshot

Bumped the demo account's email-account allowance so the page renders the
"Create Email Account" button + usage bar instead of the limit-reached state.
Updated steps to match the button → modal flow (Create Email Account opens the
form; the modal's submit button is "Create Account").

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/content/docs/whp/how-to/create-an-email-account.mdx

@@ -26,11 +26,11 @@ import Support from '~/content/partials/support-link.mdx';
 1. In the sidebar, click **Email**. The page is organized into tabs — **Email Accounts**, **Forwarders**, and **Email Domains (DNS)** — and opens on **Email Accounts**. The buttons along the top (**Webmail**, **Admin Panel**, **Setup Instructions**) open the mail server's web tools in a new tab.
    ![The WHP Email page on the Email Accounts tab, showing the tab bar and the top access buttons](~/assets/screenshots/whp/whp-email.png)
 
-2. On the **Email Accounts** tab, use the create form to add a new account on one of your domains. You'll be asked for the domain, the local part, a password, and an optional mailbox size cap.
+2. On the **Email Accounts** tab, click **Create Email Account** to open the new-account form. You'll be asked for the domain, the local part, a password, and an optional mailbox size cap.
 
 3. Set a **strong password** — at least 12 characters with a mix of upper case, lower case, numbers, and symbols. Email accounts are common attack targets.
 
-4. Click **Create**. The new account appears in the **Email Accounts** list.
+4. Click **Create Account**. The new account appears in the **Email Accounts** list.
 
 </Steps>