install open3d failed :(

### 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).

### Steps to reproduce the issue

just to pip install open3d


### Error message

```shell
Defaulting to user installation because normal site-packages is not writeable

ERROR: Could not find a version that satisfies the requirement open3d==0.18.0 (from versions: none)
ERROR: No matching distribution found for open3d==0.18.0
```

### Open3D, Python and System information

```markdown
- Operating system: Windows 11 64-bit
- Python version: Python 3.13 / output from `import sys; print(sys.version)`
- Open3D version: output from python: `print(open3d.0.18.0)`
- System architecture: x86 / arm64
- Is this a remote workstation?: no
- How did you install Open3D?: pip
- Compiler version (if built from source): n/a
```

### Additional information

_No response_