doc: add err param to fs.copyFile callback

PR-URL: #53234
Reviewed-By: LiviaMedeiros <livia@cirno.name>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

doc/api/fs.md

@@ -2388,6 +2388,7 @@ changes:
 * `dest` {string|Buffer|URL} destination filename of the copy operation
 * `mode` {integer} modifiers for copy operation. **Default:** `0`.
 * `callback` {Function}
+  * `err` {Error}
 
 Asynchronously copies `src` to `dest`. By default, `dest` is overwritten if it
 already exists. No arguments other than a possible exception are given to the

lib/fs.js

@@ -2979,7 +2979,7 @@ function mkdtempSync(prefix, options) {
  * @param {string | Buffer | URL} src
  * @param {string | Buffer | URL} dest
  * @param {number} [mode]
- * @param {() => any} callback
+ * @param {(err?: Error) => any} callback
  * @returns {void}
  */
 function copyFile(src, dest, mode, callback) {