doc: fix code example in fs.symlink method

Fixes: #40413

doc/api/fs.md

@@ -3661,7 +3661,7 @@ Relative targets are relative to the link’s parent directory.
 ```mjs
 import { symlink } from 'fs';
 
-symlink('./mew', './example/mewtwo', callback);
+symlink('./mew', './mewtwo', callback);
 ```
 
 The above example creates a symbolic link `mewtwo` in the `example` which points