Update about-per-user-pricing.md (#55003)

Co-authored-by: Sam Browning <[email protected]>

Author: holly-kassel

content/billing/managing-the-plan-for-your-github-account/about-per-user-pricing.md

@@ -66,6 +66,7 @@ If you currently pay for your {% data variables.product.prodname_enterprise %} l
 > * {% data variables.product.company_short %} counts each outside collaborator once for billing purposes, even if the user account has access to multiple repositories owned by your organization.
 > * {% data reusables.organizations.org-invite-scim %}
 > * Inviting an outside collaborator to a repository using their email address temporarily uses an available seat, even if they already have access to other repositories. After they accept the invite, the seat will be freed up again. However, inviting them using their username does not temporarily use a seat.
+> * If a user receives a {% data variables.product.prodname_copilot_short %} license from multiple organizations in the same enterprise, the enterprise will only be billed once per billing cycle for that user. One of the organizations that assigned {% data variables.product.prodname_copilot_short %} to the user will be chosen at random each month to be billed for the seat.
 
 {% data variables.product.company_short %} does not bill for the following people: