📝 Revise permissions for usage report downloads (#61286)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: heiskr

content/copilot/how-tos/manage-and-track-spending/prepare-for-usage-based-billing.md

@@ -3,7 +3,7 @@ title: Preparing your organization for usage-based billing
 shortTitle: Prepare your organization for usage-based billing
 allowTitleToDifferFromFilename: true
 intro: 'Review your estimated costs under usage-based billing and take steps to prepare your organization before the transition.'
-permissions: Enterprise owners, organization owners, and billing managers
+permissions: Enterprise owners and billing managers can download the usage report for enterprises. Organization owners can download the usage report for standalone organizations.
 versions:
   feature: copilot
 product: '{% data variables.copilot.copilot_enterprise_short %} or {% data variables.copilot.copilot_business_short %}'