Update README.md

README.md

@@ -18,7 +18,7 @@ Text embeddings can be produced as follows:
 ```python
 # pip install transformers sentencepiece
 import torch
-from transformers import LongformerForMaskedLM, LongformerTokenizerFast
+from transformers import LongformerModel, LongformerTokenizerFast
 
 model = LongformerModel.from_pretrained('kazzand/ru-longformer-tiny-16384')
 tokenizer = LongformerTokenizerFast.from_pretrained('kazzand/ru-longformer-tiny-16384')