doc: fix typo of file zlib.md

PR-URL: #58093 Reviewed-By: Daeyeon Jeong <daeyeon.dev@gmail.com> Reviewed-By: LiviaMedeiros <livia@cirno.name> Reviewed-By: Chemi Atlow <chemi@atlow.co.il> Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: samuel871211

doc/api/zlib.md

@@ -12,7 +12,7 @@ Gzip, Deflate/Inflate, and Brotli.
 To access it:
 
 ```mjs
-import os from 'node:zlib';
+import zlib from 'node:zlib';
 ```
 
 ```cjs