add bigbird typo fixes (#16897)

Co-authored-by: ChainYo <t.chaigneau.tc@gmail.com>

src/transformers/onnx/features.py

@@ -159,7 +159,7 @@ class FeaturesManager:
             "question-answering",
             onnx_config_cls=BertOnnxConfig,
         ),
-        "bigbird": supported_features_mapping(
+        "big-bird": supported_features_mapping(
             "default",
             "masked-lm",
             "causal-lm",

tests/onnx/test_onnx_v2.py

@@ -172,7 +172,7 @@ class OnnxConfigWithPastTestCaseV2(TestCase):
 PYTORCH_EXPORT_MODELS = {
     ("albert", "hf-internal-testing/tiny-albert"),
     ("bert", "bert-base-cased"),
-    ("bigbird", "google/bigbird-roberta-base"),
+    ("big-bird", "google/bigbird-roberta-base"),
     ("ibert", "kssteven/ibert-roberta-base"),
     ("camembert", "camembert-base"),
     ("convbert", "YituTech/conv-bert-base"),