format by milliseconds， 'SS' or 'S' is not work

dayjs().format('mm-ss S') -> 08-40 S
dayjs().format('mm-ss SS') -> 08-40 SS
dayjs().format('mm-ss SSS') -> 08-40 047

if format by ‘S’ and 'SS' is not work, why it is in [list of all available parsing tokens ](https://dayjs.gitee.io/docs/en/parse/string-format#list-of-all-available-parsing-tokens)

I'm not sure if it's a bug

Start by reproducing the three dayjs().format('mm-ss S'), 'SS', and 'SSS' examples, then compare their behavior with the linked list of available parsing tokens. Done means the behavior of S and SS is resolved and the documentation or formatting behavior is made consistent.

Written by the indexing model from the issue text.