Incorrect bootstrap filename

[cjntaylor]

When run from within a zip file (such as by directly importing the shiv wheel or within a traditional zipapp), the bootstrap files are stored with temporary file names (From src/shiv/builder.py#L160-L167):

write_to_zipapp(
    archive,
    str(bootstrap_target / path.name),
    data,
    zipinfo_datetime,
    compression,
    stat=path.stat(),
)

str(bootstrap_target / path.name) won't work when embedded - path points to a temporarily extracted temporary file, producing archive names like this:

1980-01-01 06:00:00 .....         8977         3275  _bootstrap/tmp3dxelv3u__init__.py
1980-01-01 06:00:00 .....         2878          945  _bootstrap/tmpxt4291z2environment.py
1980-01-01 06:00:00 .....         2063          716  _bootstrap/tmp1lkt9o0xfilelock.py
1980-01-01 06:00:00 .....         1762          725  _bootstrap/tmprndqhn00interpreter.py

Is there some reason this isn't just str(bootstrap_target / bootstrap_file)? Making this simple change seems to work correctly in all cases I can test. PR incoming.