OpenAPI: fix proxy clone request

.changeset/seven-adults-look.md

@@ -0,0 +1,5 @@
+---
+'fumadocs-openapi': patch
+---
+
+fix proxy clone request

packages/openapi/src/server/proxy.ts

@@ -79,9 +79,10 @@ export function createProxy(options: CreateProxyOptions = {}): Proxy {
     }
 
     let proxied = new Request(parsedUrl, {
-      ...req,
+      method: req.method,
       cache: 'no-cache',
-      mode: 'cors',
+      headers: req.headers,
+      body: await req.arrayBuffer(),
     });
 
     if (overrides?.request) {