fix use node: protocol for async_hooks import (#52)

* fix use node: protocol for async_hooks import

Author: wootsbot

.changeset/hot-clocks-hunt.md

@@ -0,0 +1,5 @@
+---
+'@vercel/flags': patch
+---
+
+fix use node: protocol for async_hooks import

packages/flags/src/lib/tracing.ts

@@ -4,8 +4,9 @@ import type {
   TracerProvider,
   AttributeValue,
 } from '@opentelemetry/api';
+import { AsyncLocalStorage } from 'node:async_hooks';
+
 import { name as pkgName, version } from '../../package.json';
-import { AsyncLocalStorage } from 'async_hooks';
 
 // Use a symbol to avoid having global variable that is scoped to this file,
 // as it can lead to issues with cjs and mjs being used at the same time.