test: fix comment of fs.promises write

PR-URL: #21708
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: Shingo Inoue <leko.noor@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

test/parallel/test-fs-promises-file-handle-write.js

@@ -3,7 +3,7 @@
 const common = require('../common');
 
 // The following tests validate base functionality for the fs.promises
-// FileHandle.read method.
+// FileHandle.write method.
 
 const fs = require('fs');
 const { open } = fs.promises;