Add palpo to ECOSYSTEM.md

ECOSYSTEM.md

@@ -24,6 +24,7 @@ If your project isn't listed here and you would like it to be, please feel free
 - [myblog](https://github.com/driftluo/myblog): This is my personal blog.
 - [opensound](https://github.com/opensound-org/opensound): Pro-Audio system engine, using `salvo` as the default HTTP server backend（专业音频系统引擎，使用`salvo`作为默认HTTP服务器后端）.
 - [static-api](https://github.com/josejachuf/static-api-rs): This is a simple application emulating a basic REST API.
+- [palpo](https://github.com/palpo-matrix-server/palpo):A Rust Matrix Server Implementation.
 
 ## Tutorials
 - [Rust Salvo零基础教程](https://www.bilibili.com/video/BV1FS421N71D/): Rust Salvo零基础入门教程.