Update json-endpoint.mdx

Author: daisyfaithauma

src/content/docs/browser-rendering/rest-api/json-endpoint.mdx

@@ -234,5 +234,4 @@ const client = new Cloudflare({
 const json = await client.browserRendering.json.create({ account_id: 'account_id' });
 
 console.log(json);
-```s
-````
+```