build: 将 pom.xml 中的版本号从 3.1.12 修改为 3.1.13

Author: yujale-rd

README.md

@@ -25,7 +25,7 @@ This SDK is built upon [Authing Management API(v3)](https://api.authing.cn/opena
   <dependency>
       <groupId>cn.authing</groupId>
       <artifactId>authing-java-sdk</artifactId>
-      <version>3.1.11</version>
+      <version>3.1.13</version>
   </dependency>
 ```