Readme tip to use environment variable to patch causes all Python installation for all versions to fail on MacOS Sonoma 14.0

### Provide environment information

```bash
I have a MacOs with Sonoma 14.0. I followed the README of the plugin and set the env var ASDF_PYTHON_PATCH_URL.
```

### To Reproduce

On MacOs set the URL accordingly to the README.
Then run
`asdf install python 3.9.0`

### Describe the Bug

I attempted to install a version of python. The installation would fail without any explanation.

### Expected Behaviour

I expected a clean installation of python.