Update enabling-codespaces-for-your-organization.md (#12287)

* Update enabling-codespaces-for-your-organization.md

Need to be more verbose about the requirements. CODESPACES is currently not available for orgs with IP Allow list enabled.

* Update content/codespaces/managing-codespaces-for-your-organization/enabling-codespaces-for-your-organization.md

Co-authored-by: hubwriter <hubwriter@github.com>

Author: highfi13g

content/codespaces/managing-codespaces-for-your-organization/enabling-codespaces-for-your-organization.md

@@ -26,6 +26,7 @@ To use codespaces in your organization, you must do the following:
 - Ensure that users have [at least write access](/organizations/managing-access-to-your-organizations-repositories/repository-permission-levels-for-an-organization) to the repositories where they want to use a codespace. 
 - [Enable {% data variables.product.prodname_codespaces %} for users in your organization](#configuring-which-users-in-your-organization-can-use-codespaces). You can choose allow {% data variables.product.prodname_codespaces %} for selected users or only for specific users.
 - [Set a spending limit](/billing/managing-billing-for-github-codespaces/managing-spending-limits-for-codespaces)
+- Ensure that your organization does not have an IP address allow list enabled. For more information, see "[Managing allowed IP addresses for your organization](/organizations/keeping-your-organization-secure/managing-allowed-ip-addresses-for-your-organization)."
 
 By default, a codespace can only access the repository from which it was created. If you want codespaces in your organization to be able to access other organization repositories that the codespace creator can access, see "[Managing access and security for {% data variables.product.prodname_codespaces %}](/codespaces/managing-codespaces-for-your-organization/managing-access-and-security-for-your-organizations-codespaces)."