Fix bug in super-zarr-open

Author: alejoe91

src/spikeinterface/core/zarrextractors.py

@@ -62,8 +62,8 @@ def super_zarr_open(folder_path: str | Path, mode: str = "r", storage_options: d
     else:
         storage_options_to_test = (storage_options,)
 
+    root = None
     if is_path_remote(str(folder_path)):
-        root = None
         for open_func in open_funcs:
             if root is not None:
                 break