update README.md.

Signed-off-by: 聆听 <sugar1569@vip.qq.com>

README.md

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 <div align="center" >
     <img src="https://www.crmeb.com/static/images/dark_logo.png" />
 </div>
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 <div align="center">
 
 CRMEB开源商城系统PHP版
@@ -40,7 +41,8 @@ CRMEB开源商城系统PHP版
 <div align="center" >
 <a href="https://gitee.com/ZhongBangKeJi/CRMEB/blob/master/README.md">宽屏预览</a>
 </div>
-</div>
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+
 
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