Fixes missing url version prefix

Author: chris-young-helius

api-reference/admin/get-project-usage.mdx

@@ -4,7 +4,7 @@ title: "Get Project Usage"
 sidebarTitle: "Get Project Usage"
 description: "Retrieve credit usage, subscription details, and per-service request counts for a project within the current billing cycle."
 "og:description": "Get credit usage, billing details, and request counts for a Helius project"
-openapi: "/openapi/admin-api/getProjectUsage.yaml GET /admin/projects/{id}/usage"
+openapi: "/openapi/admin-api/getProjectUsage.yaml GET /v0/admin/projects/{id}/usage"
 ---
 
 ## Overview

openapi/admin-api/getProjectUsage.yaml

@@ -138,7 +138,7 @@ components:
           description: HTTP error name.
 
 paths:
-  /admin/projects/{id}/usage:
+  /v0/admin/projects/{id}/usage:
     get:
       tags:
         - Admin