Fix wiki link

Author: zxdong262

README.md

@@ -41,15 +41,7 @@ Just take [src/file_store.py](src/file_store.py) as an example, write your own r
 
 ## Sync server in other languages
 
-- [electerm-sync-server-kotlin](https://github.com/electerm/electerm-sync-server-kotlin)
-- [electerm-sync-server-vercel](https://github.com/electerm/electerm-sync-server-vercel)
-- [electerm-sync-server-rust](https://github.com/electerm/electerm-sync-server-rust)
-- [electerm-sync-server-cpp](https://github.com/electerm/electerm-sync-server-cpp)
-- [electerm-sync-server-java](https://github.com/electerm/electerm-sync-server-java)
-- [electerm-sync-server-node](https://github.com/electerm/electerm-sync-server-node)
-- [electerm-sync-server-python](https://github.com/electerm/electerm-sync-server-python)
-- [electerm-sync-server-deno](https://github.com/electerm/electerm-sync-server-deno)
-- [electerm-sync-server-go](https://github.com/electerm/electerm-sync-server-go)
+[https://github.com/electerm/electerm/wiki/Custom-sync-server](https://github.com/electerm/electerm/wiki/Custom-sync-server)
 
 ## License