change QR code picture

README.md

@@ -1,4 +1,4 @@
-<div align=center><img width="220" height="220" alt="Logo was Loading Faild!" src="https://raw.githubusercontent.com/go-pay/gopay/main/logo.png"/></div>
+<div align=center><img width="240" height="240" alt="Logo was Loading Faild!" src="https://raw.githubusercontent.com/go-pay/gopay/main/logo.png"/></div>
 
 # GoPay
 
@@ -349,9 +349,9 @@ func main() {
 * 有问题请加QQ群（加群验证答案：gopay），微信加好友拉群（微信群比较活跃）。在此，非常感谢那些加群后，提出意见和反馈问题的同志们！
 
 QQ群：
-<img width="300" height="300" src="https://raw.githubusercontent.com/go-pay/gopay/main/qq_gopay.png"/>
+<img width="280" height="280" src="https://raw.githubusercontent.com/go-pay/gopay/main/qq_gopay.png"/>
 加微信拉群：
-<img width="300" height="300" src="https://raw.githubusercontent.com/go-pay/gopay/main/wechat_jerry.png"/>
+<img width="280" height="280" src="https://raw.githubusercontent.com/go-pay/gopay/main/wechat_jerry.png"/>
 
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