[Copilot] Adds premium request counter reset time (#56432)

Author: crwaters16

content/copilot/concepts/copilot-billing/understanding-and-managing-requests-in-copilot.md

@@ -16,7 +16,7 @@ redirect_from:
 > [!IMPORTANT]
 > * Billing for premium requests began on June 18, 2025 for all paid {% data variables.product.prodname_copilot_short %} plans, and the request counters were only set to zero for paid plans.
 > * {% data reusables.copilot.data-residency-availability %}
-> * Premium request counters reset on the 1st of each month. See [AUTOTITLE](/copilot/managing-copilot/understanding-and-managing-copilot-usage/monitoring-your-copilot-usage-and-entitlements).
+> * Premium request counters reset on the 1st of each month at 00:00:00 UTC. See [AUTOTITLE](/copilot/managing-copilot/understanding-and-managing-copilot-usage/monitoring-your-copilot-usage-and-entitlements).
 > * Certain requests may experience rate limits to accommodate high demand. Rate limits restrict the number of requests that can be made within a specific time period.
 
 ## What is a request?

content/copilot/how-tos/monitoring-your-copilot-usage-and-entitlements.md

@@ -16,7 +16,7 @@ redirect_from:
 You can track your monthly usage of premium requests to help you get the most value from your {% data variables.product.prodname_copilot_short %} plan.
 
 > [!NOTE]
-> Premium request counters reset on the 1st of each month.
+> Premium request counters reset on the 1st of each month at 00:00:00 UTC.
 
 ## Viewing premium request usage