feat: add GPU pricing to Cost Control docs

Author: johannesfrey

platform/configure/cost-control.mdx

@@ -16,7 +16,7 @@ virtual clusters the platform deploys and manages [Prometheus](https://prometheu
 [OpenCost](https://www.opencost.io/) on each connected cluster. Prometheus uses a time series database that requires
 persistent volume storage to retain metrics over time. The platform-managed
 Prometheus is configured to collect the minimum metrics required for the cost
-control dashboard. OpenCost provides CPU and Memory allocation metrics for the
+control dashboard. OpenCost provides CPU, GPU, and Memory allocation metrics for the
 deployed workloads.
 
 In addition to the Prometheus instance on the connected cluster, the cluster
@@ -71,6 +71,10 @@ config:
       averageRAMPricePerNode:
         price: 31
         timePeriod: Monthly
+      # Average GPU cost
+      averageGPUPricePerNode:
+        price: 31
+        timePeriod: Monthly
       # Monthly or Yearly cost for Hosted Control Planes
       controlPlanePricePerCluster:
         price: 900