Docs for traceback module claim wrong defaults for tb parameter

### CircuitPython version and board name

```python
latest
```

### Code/REPL

```python
import traceback
```

### Behavior

traceback.print_traceback(e) behaves differently than traceback.print_traceback(e, tb=None), even though the docs claim the default value for tb when not specified is None

### Description

_No response_

### Additional information

_No response_