1.优化支付宝绑定验证码位数

lib/pages/security_page/security_bind_alipay/security_bind_alipay_page.dart

@@ -80,7 +80,7 @@ class _SecurityBindAlipayContainerState
   void _verifiy() {
     bool canConfirm = _nameController.text.length > 0 &&
         _accountController.text.length > 0 &&
-        _codeController.text.length >= 4 && _codeController.text.length <= 4;
+        _codeController.text.length >= 4 && _codeController.text.length <= 6;
     if (canConfirm != _canConfirm) {
       setState(() {
         _canConfirm = canConfirm;