Workaround for MinGW

[MihailJP]

Fix error like 'git.exc.NoSuchPathError: C:/c/Users/parrot/git/wp43'

The issue occurs after upgrading Python on MinGW64 to version 3.12.7

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:/msys64/mingw64/bin/git-up.exe/__main__.py", line 7, in <module>
  File "C:/msys64/mingw64/lib/python3.12/site-packages/PyGitUp/gitup.py", line 570, in run
    gitup = GitUp()
            ^^^^^^^
  File "C:/msys64/mingw64/lib/python3.12/site-packages/PyGitUp/gitup.py", line 134, in __init__
    self.repo = Repo(repo_dir, odbt=GitCmdObjectDB)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:/msys64/mingw64/lib/python3.12/site-packages/git/repo/base.py", line 236, in __init__
    raise NoSuchPathError(epath)
git.exc.NoSuchPathError: C:/c/Users/parrot/git/wp43