fix[main.py]: Force path to POSIX format so Windows

Author: MangelRyujin

src/edit_python_pe/main.py

@@ -5,7 +5,7 @@
 import re
 from datetime import datetime
 from time import sleep
-
+import pathlib
 import pygit2
 from github import Github
 from github.GithubException import BadCredentialsException, GithubException
@@ -522,6 +522,7 @@ def save_member(self) -> None:
         # commit & push
         repo = pygit2.Repository(self.REPO_PATH)
         rel_path = os.path.relpath(file_path, self.REPO_PATH)
+        rel_path = pathlib.Path(rel_path).as_posix() # Force path to POSIX format so Windows backslashes (\) don't break pygit2
         repo.index.add(rel_path)
         repo.index.write()
         author_sig = pygit2.Signature(