doc: fix typo of file zlib.md

PR-URL: #58093
Reviewed-By: Daeyeon Jeong <[email protected]>
Reviewed-By: LiviaMedeiros <[email protected]>
Reviewed-By: Chemi Atlow <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: samuel871211

doc/api/zlib.md

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