The viewer raises PermissionError after updating datasets to 3.0.1

[albertvillanova]

As reported by @lhoestq, the viewer raises PermissionError after updating datasets to 3.0.1:

• 3071

  Error code:   RetryableConfigNamesError
  Exception:    PermissionError
  Message:      [Errno 13] Permission denied: '/.cache'
  Traceback:    Traceback (most recent call last):
              File "/src/services/worker/src/worker/job_runners/dataset/config_names.py", line 66, in compute_config_names_response
                config_names = get_dataset_config_names(
              File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/inspect.py", line 164, in get_dataset_config_names
                dataset_module = dataset_module_factory(
              File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/load.py", line 1671, in dataset_module_factory
                raise e1 from None
              File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/load.py", line 1640, in dataset_module_factory
                return HubDatasetModuleFactoryWithoutScript(
              File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/load.py", line 1007, in get_module
                dataset_readme_path = cached_path(
              File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/utils/file_utils.py", line 182, in cached_path
                output_path = huggingface_hub.HfApi(
              File "/src/services/worker/.venv/lib/python3.9/site-packages/huggingface_hub/utils/_validators.py", line 114, in _inner_fn
                return fn(*args, **kwargs)
              File "/src/services/worker/.venv/lib/python3.9/site-packages/huggingface_hub/hf_api.py", line 5280, in hf_hub_download
                return hf_hub_download(
              File "/src/services/worker/.venv/lib/python3.9/site-packages/huggingface_hub/utils/_deprecation.py", line 101, in inner_f
                return f(*args, **kwargs)
              File "/src/services/worker/.venv/lib/python3.9/site-packages/huggingface_hub/utils/_validators.py", line 114, in _inner_fn
                return fn(*args, **kwargs)
              File "/src/services/worker/.venv/lib/python3.9/site-packages/huggingface_hub/file_download.py", line 1240, in hf_hub_download
                return _hf_hub_download_to_cache_dir(
              File "/src/services/worker/.venv/lib/python3.9/site-packages/huggingface_hub/file_download.py", line 1357, in _hf_hub_download_to_cache_dir
                os.makedirs(os.path.dirname(blob_path), exist_ok=True)
              File "/usr/local/lib/python3.9/os.py", line 215, in makedirs
                makedirs(head, exist_ok=exist_ok)
              File "/usr/local/lib/python3.9/os.py", line 215, in makedirs
                makedirs(head, exist_ok=exist_ok)
              File "/usr/local/lib/python3.9/os.py", line 215, in makedirs
                makedirs(head, exist_ok=exist_ok)
              [Previous line repeated 1 more time]
              File "/usr/local/lib/python3.9/os.py", line 225, in makedirs
                mkdir(name, mode)
            PermissionError: [Errno 13] Permission denied: '/.cache'