Update README.md

README.md

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-Very sad day for all of us.  @FengZiYjun  is no more with us.  May his soul rest in peace. We will miss you very very much!
+*Very sad day for all of us.  @FengZiYjun  is no more with us.  May his soul rest in peace. We will miss you very very much!*
 
 FastNLP is a modular Natural Language Processing system based on PyTorch, built for fast development of NLP models.