doc: fix documentation for fs.createWriteStream highWaterMark option

PR-URL: #49456 Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: LiviaMedeiros <[email protected]>

Author: mertcanaltin

doc/api/fs.md

@@ -325,6 +325,7 @@ added: v16.11.0
  * `autoClose`{boolean} **Default:** `true`
  * `emitClose`{boolean} **Default:** `true`
  * `start`{integer}
+ * `highWaterMark`{number} **Default:** `16384`
 * Returns:{fs.WriteStream}
 
 `options` may also include a `start` option to allow writing data at some
@@ -2553,6 +2554,7 @@ changes:
  * `start`{integer}
  * `fs`{Object|null} **Default:** `null`
  * `signal`{AbortSignal|null} **Default:** `null`
+ * `highWaterMark`{number} **Default:** `16384`
 * Returns:{fs.WriteStream}
 
 `options` may also include a `start` option to allow writing data at some