fix(commit): use os.unlink to remove temp file

NamedTemporaryFile doesn't have a unlink function when delete=False is used

Fix commitizen-tools#1352

Author: oed-gubina

commitizen/commands/commit.py

@@ -89,7 +89,7 @@ def manual_edit(self, message: str) -> str:
         subprocess.call(argv)
         with open(file_path) as temp_file:
             message = temp_file.read().strip()
-        file.unlink()
+        os.unlink(file.name)
         return message
 
     def __call__(self):