fix: normalize root path separator in test_normalize_path on Windows

replace('\\', '') stripped the trailing slash entirely, giving 'D:'
while normalize_path returns 'D:/'. Convert to forward slash instead
so both sides match.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: tzilio-cls

zcollection/tests/test_fs_utils.py

@@ -114,8 +114,7 @@ def test_normalize_path() -> None:
     fs = fsspec.filesystem('file')
     root = str(pathlib.Path('/').resolve())
     if platform.system() == 'Windows':
-        # fsspec returns only the drive letter for the root path.
-        root = root.replace('\\', '')
+        root = root.replace('\\', '/')
 
     def istrcmp(str1, str2):
         """Case insensitive string comparison."""