pip error 400 for torch cuda wheel files

### Checklist

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

### Steps to reproduce the issue

Installing open3D-ML on a new environment:

using th efollowing commands:
pip install --upgrade pip
pip install open3d
pip install -r requirements-torch-cuda.txt

### Error message

```shell
WARNING: The directory '/home/jovyan/.cache/pip' or its parent directory is not owned or is not writable by the current user. The cache has been disabled. Check the permissions and owner of that directory. If executing pip with sudo, you should use sudo's -H flag.
Looking in links: https://download.pytorch.org/whl/lts/1.8/torch_lts.html
Ignoring torch: markers 'python_version == "3.6"' don't match your environment
Ignoring torch: markers 'python_version == "3.7"' don't match your environment
Ignoring torch: markers 'python_version == "3.8"' don't match your environment
Collecting torch==1.8.2
ERROR: HTTP error 400 while getting https://s3.us-west-1.wasabisys.com/open3d-downloads/torch-1.8.2-cp39-cp39-linux_x86_64.whl
ERROR: Could not install requirement torch==1.8.2 from https://s3.us-west-1.wasabisys.com/open3d-downloads/torch-1.8.2-cp39-cp39-linux_x86_64.whl (from -r requirements-torch-cuda.txt (line 4)) because of HTTP error 400 Client Error: Bad Request for url: https://s3.us-west-1.wasabisys.com/open3d-downloads/torch-1.8.2-cp39-cp39-linux_x86_64.whl for URL https://s3.us-west-1.wasabisys.com/open3d-downloads/torch-1.8.2-cp39-cp39-linux_x86_64.whl
```

### Open3D, Python and System information

```markdown
- Operating system: Ubuntu 20.04.4 LTS
- Python version: 3.9.12
- Open3D version: 0.15.2
- System type: x86_64
- Is this remote workstation?: yes
- How did you install Open3D?: pip
- Compiler version (if built from source): None
```

### Additional information

_No response_