Update trial criteria for GitHub Advanced Security (#58791)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: mc <42146119+mchammer01@users.noreply.github.com>

Author: 3 people

content/code-security/trialing-github-advanced-security/trial-advanced-security.md

@@ -23,10 +23,11 @@ contentType: how-tos
 
 To set up a trial of {% data variables.product.prodname_GHAS %} using this method, you must meet the following criteria:
 
-1. Be an owner of an enterprise account. See [AUTOTITLE](/enterprise-cloud@latest/admin/overview/about-enterprise-accounts).
-1. Pay by credit card or PayPal.
-1. Have not previously purchased or had a trial of {% data variables.product.prodname_GHAS %}.
+1. You are an owner of an enterprise account. See [AUTOTITLE](/enterprise-cloud@latest/admin/overview/about-enterprise-accounts).
+1. You pay by credit card or PayPal.
+1. You have not previously purchased {% data variables.product.prodname_GHAS %} (that is, you do not currently or in the past have a paid license for {% data variables.product.prodname_GHAS %}).
 1. You are not already using metered billing for {% data variables.product.prodname_GHAS %}.
+1. If you have had a previous {% data variables.product.prodname_GHAS %} trial, you are eligible only if you have had no more than one previous trial and it ended at least 180 days ago.
 
 > [!TIP]
 > * **No enterprise account?** Start a trial of {% data variables.product.prodname_ghe_cloud %} with {% data variables.product.prodname_GHAS %}. See [AUTOTITLE](/enterprise-cloud@latest/admin/overview/setting-up-a-trial-of-github-enterprise-cloud).