minstall: help mypy out with our chown overriding

This is an annoying issue to look at, because shutil.chown has (for our
purposes) three signatures:
```python
chown(path: int | AnyPathLike, uid: int | str, group: None = None) -> None: ...
chown(path: int | AnyPathLike, uid: None, group: int | str) -> None: ...
chown(path: int | AnyPathLike, uid: int | str, group: int | str) -> None: ...
```

This is a really difficult thing to guarantee from our code. We more or
less depend on being able to pass two parameters of `None | int | str`,
and it working. In our only caller we do ensure that at least one of the
variables is not None, but convincing mypy of this is more work than
it's worth.

This will show up in our CI only for python >= 3.13. An updated typshed
will make this show up for earlier versions, however. Pyright (which is
used by the VSCode Python extension) will spot this for earlier
versions. I have changed the code in such a way to make our CI turn
green.

0 files changed, 0 insertions, 0 deletions