fix: provide configPromise to getPayload to avoid error on first-time, uncached load

src/components/Example.tsx

@@ -1,8 +1,9 @@
 import React from 'react'
 import { getPayload } from 'payload'
+import configPromise from '@payload-config'
 
 const Example: React.FC = async () => {
-  const payload = await getPayload()
+  const payload = await getPayload({ config: configPromise })
   const url = payload.config.serverURL
   return <div>The admin panel is running at: {url}</div>
 }