fix: msg_stamp.size() is unsigned,should convert to int (#2523)

TouchZZZ

2025-05-22 eccf74684743593950ad259877db7ce9ffc06e93

 runtime/python/websocket/README.md

@@ -16,7 +16,7 @@
### Install the requirements for server

```shell
cd funasr/runtime/python/websocket
cd runtime/python/websocket
pip install -r requirements_server.txt
```