update README.md.

README.md

@@ -1,4 +1,4 @@
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+![输入图片说明](https://images.gitee.com/uploads/images/2020/1029/122041_2a0c5bda_1491977.png "屏幕截图.png")
 <p align="center">
     <img src="https://images.gitee.com/uploads/images/2018/1214/151026_2299df23_892944.gif" />
 </p>