Add or more prominently link to documentation for `step.retry()`

During normal usage of `codeceptjs@3.7.2` I see the following repeated warning:

```
I.retry() is deprecated, use step.retry() instead
```

This comes from [here](https://github.com/codeceptjs/CodeceptJS/blob/df7e0beac13fa59167162034adf3859fdb7be335/lib/actor.js#L61), naturally.

Unfortunately I am unable to find any documentation of what `step.retry()` is or how to use it?


and


The [documentation for retrying](https://codecept.io/basics/#retries) still uses `I.retry()` throughout:


Could you please add documentation for `step.retry()`, or if the documentation exists, could you please make it easier to find.