Update README.md

Y4tacker · web-flow · commit b6ec1fb8a6f9 · 2023-08-27T11:40:07.000+08:00
diff --git a/README.md b/README.md
@@ -135,6 +135,7 @@
 
 - 其他
   - [Java JSON解析特性分析](https://javasec.org/javaweb/JSON/FEATURE.html)
+  - [黑盒判断目标的fastjson版本](https://mp.weixin.qq.com/s/jbkN86qq9JxkGNOhwv9nxA)
 
 ## 4.Weblogic专区(虽然也挖了一堆，暂时不想写)
 - [T3协议学习](https://github.com/Y4tacker/JavaSec/blob/main/4.Weblogic专区/T3%E5%8D%8F%E8%AE%AE%E5%AD%A6%E4%B9%A0/T3%E5%8D%8F%E8%AE%AE%E5%AD%A6%E4%B9%A0.md)
