Update batch encode plus first argument to match HF convention.

tokenizer.py

@@ -101,9 +101,9 @@ class ByteTokenizer(PreTrainedTokenizer):
             verbose=kwargs.get('verbose', True),
         )
 
-    def _batch_encode_plus(self, batch_text: List[str], **kwargs) -> BatchEncoding:
+    def _batch_encode_plus(self, batch_text_or_text_pairs: List[str], **kwargs) -> BatchEncoding:
 
-        input_ids = [(self.byte_tokenize(text).tolist(), None) for text in batch_text]
+        input_ids = [(self.byte_tokenize(text).tolist(), None) for text in batch_text_or_text_pairs]
 
         return self._batch_prepare_for_model(
             input_ids,