更新 'README.md'

README.md

@@ -95,7 +95,7 @@
 ### 问题
 当出现类似提示时，请安装 [.Net Framework 4.5.2](http://sunqida.qiniudn.com/NDP452-KB2901907-x86-x64-AllOS-ENU.exe)
 
-![错误提示](https://cdn.sunqida.cn/quick/Net.gif?imageMogr2/thumbnail/750x/blur/1x0/quality/100|imageslim)
+![错误提示](https://cdn.sunqida.cn/quick/Net.jpg?imageMogr2/thumbnail/750x/blur/1x0/quality/100|imageslim)
 
 
 ## 反馈与建议