Update repo to isort v5 (#6686)

* Run new isort

* More changes

* Update CI, CONTRIBUTING and benchmarks

src/transformers/hf_api.py

@@ -19,9 +19,10 @@ import os
 from os.path import expanduser
 from typing import Dict, List, Optional, Tuple
 
-import requests
 from tqdm import tqdm
 
+import requests
+
 
 ENDPOINT = "https://huggingface.co"