doc: fix typo "director" instead of "directory"

Change fs.readdirSync() description from "Reads the contents of
the director." to "Reads the contents of the directory."

PR-URL: nodejs#37523
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Harshitha K P <[email protected]>
Reviewed-By: Darshan Sen <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Benjamin Gruenbaum <[email protected]>
Reviewed-By: Gerhard Stöbich <[email protected]>
Reviewed-By: James M Snell <[email protected]>

doc/api/fs.md

@@ -4533,7 +4533,7 @@ changes:
   * `withFileTypes` {boolean} **Default:** `false`
 * Returns: {string[]|Buffer[]|fs.Dirent[]}
 
-Reads the contents of the director.
+Reads the contents of the directory.
 
 See the POSIX readdir(3) documentation for more details.