Update repo to isort v5 (#6686)

* Run new isort

* More changes

* Update CI, CONTRIBUTING and benchmarks

tests/test_modeling_tf_distilbert.py

@@ -25,14 +25,15 @@ from .test_modeling_tf_common import TFModelTesterMixin, ids_tensor
 
 if is_tf_available():
     import tensorflow as tf
+
     from transformers.modeling_tf_distilbert import (
-        TFDistilBertModel,
+        TF_DISTILBERT_PRETRAINED_MODEL_ARCHIVE_LIST,
         TFDistilBertForMaskedLM,
+        TFDistilBertForMultipleChoice,
         TFDistilBertForQuestionAnswering,
         TFDistilBertForSequenceClassification,
         TFDistilBertForTokenClassification,
-        TFDistilBertForMultipleChoice,
-        TF_DISTILBERT_PRETRAINED_MODEL_ARCHIVE_LIST,
+        TFDistilBertModel,
     )