Documentation for registration_fgr_based_on_feature_matching not updated

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](https://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](https://www.open3d.org/docs/release/) and the [latest documentation](https://www.open3d.org/docs/latest/) (for `main` branch).

### Describe the issue

the registration for `registration_fgr_based_on_feature_matching` was not updated after the rename of the function from registration_fast_based_on_feature_matching

### Steps to reproduce the bug

```python
read documentation at https://www.open3d.org/html/python_api/open3d.registration.registration_fast_based_on_feature_matching.html#open3d.registration.registration_fast_based_on_feature_matching
```

### Error message

_No response_

### Expected behavior

_No response_

### Open3D, Python and System information

```markdown
- Operating system: Ubuntu 20.04
- Python version: Python 3.8
- Open3D version: 0.18.0
- System architecture: x86
- Is this a remote workstation?: yes
- How did you install Open3D?: pip
```

### Additional information

_No response_