Fix missing display of non-freethreaded Python 3.13 in `python list` (#9669)
Closes https://github.com/indygreg/python-build-standalone/issues/407
```
❯ cargo run -q -- python list | head -n 2
cpython-3.13.0+freethreaded-macos-aarch64-none <download available>
cpython-3.13.0-macos-aarch64-none <download available>
❯ uv python list | head -n 2
cpython-3.13.0+freethreaded-macos-aarch64-none <download available>
cpython-3.12.7-macos-aarch64-none <download available>
```