Update documentation on changing enterprise slug to include ghe not supported (#60128)

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: DamienButler

content/admin/managing-your-enterprise-account/changing-the-url-for-your-enterprise.md

@@ -16,6 +16,7 @@ If your company pays for {% data variables.product.prodname_ghe_cloud %} by cred
 
 > [!NOTE]
 > If you pay for {% data variables.product.prodname_ghe_cloud %} via invoice, or if your enterprise uses {% data variables.product.prodname_emus %}, you must contact {% data variables.contact.contact_enterprise_sales %} to change your enterprise slug.
+> For enterprises hosted on {% data variables.enterprise.data_residency_site %}, changing the enterprise slug is not currently supported.
 
 ## Considerations when changing your enterprise slug