fix 支付宝实体类字段类型不一致

dax-pay/src/main/java/cn/bootx/platform/daxpay/param/channel/alipay/AlipayConfigParam.java

@@ -41,7 +41,7 @@ public class AlipayConfigParam implements Serializable {
     private String serverUrl;
 
     @Schema(description = "认证类型 证书/公钥")
-    private Integer authType;
+    private String authType;
 
     @Schema(description = "签名类型")
     public String signType;