fix: fix code display in release blog

Fixes: #3976

locale/en/blog/release/v16.5.0.md

@@ -18,7 +18,7 @@ Node.js now exposes an experimental implementation of the
 While it is experimental, the API is not exposed on the global object and is only
 accessible using the new `stream/web` core module:
 
-```mjs
+```js
 import { ReadableStream, WritableStream } from 'stream/web';
 // Or from 'node:stream/web'
 ```