Update repo to isort v5 (#6686)

* Run new isort

* More changes

* Update CI, CONTRIBUTING and benchmarks

examples/adversarial/utils_hans.py

@@ -20,8 +20,8 @@ from dataclasses import dataclass
 from typing import List, Optional, Union
 
 import tqdm
-from filelock import FileLock
 
+from filelock import FileLock
 from transformers import (
     BartTokenizer,
     BartTokenizerFast,