Update update_history_en.md

docs/en/update_history_en.md

 # Release Notes
 
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+- 2021.01.27
+   * Add ViT and DeiT pretrained models, ViT's Top-1 Acc on ImageNet reaches 81.05%, and DeiT reaches 85.5%.
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 - 2021.01.08
     * Add support for whl package and its usage, Model inference can be done by simply install paddleclas using pip.