Inconsistent format in dataclasses.rst

# Documentation

The `dataclasses.rst` documentation uses inconsistent formatting for booleans. For example in the section `The parameters to @dataclass are:`

```
- ``init``: If true (the default), (...)
```

vs

```
- ``unsafe_hash``: If ``False`` (the default) (...)
```


### Linked PRs
* gh-134948