update README

Author: ARS4EVER

README.md

@@ -3,7 +3,6 @@
   <h1 align="center">QSP</h1>
   <h3 align="center">基于PQC的抗量子秘密文件共享与传输系统</h3>
 </div>
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 <!-- PROJECT SHIELDS -->
 
 <p align="center">