[SUPPORT] Fix 2FA enable step to reflect new dashboard UI (#29885)

Author: tmcloughlin-cf

src/content/partials/support/2fa-enable.mdx

@@ -17,8 +17,7 @@ To enable two-factor authentication for your Cloudflare login:
 1. Log in to the [Cloudflare dashboard](https://dash.cloudflare.com/login).
 2. Under the **My Profile** dropdown, select **My Profile**.
 3. Select **Authentication**. 
-4. Select **Manage** in the Two-Factor Authentication card.
-5. Configure either a [TOTP mobile app](/fundamentals/user-profiles/2fa/#configure-totp-mobile-application-authentication), [security key](/fundamentals/user-profiles/2fa/#configure-security-key-authentication-for-two-factor-cloudflare-login), or [email 2FA](/fundamentals/user-profiles/2fa/#configure-email-two-factor-authentication).
+4. Select **Add** next to [Mobile App Authentication](/fundamentals/user-profiles/2fa/#configure-totp-mobile-application-authentication) or [Security Key Authentication](/fundamentals/user-profiles/2fa/#configure-security-key-authentication-for-two-factor-cloudflare-login), or **Enable** next to [Email Authentication](/fundamentals/user-profiles/2fa/#configure-email-two-factor-authentication).
 
 :::note