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

TouchZZZ

2025-05-22 eccf74684743593950ad259877db7ce9ffc06e93

 docs/README.md

@@ -4,9 +4,9 @@
For convenience, we provide users with the ability to generate local HTML manually.

First, you should install the following packages, which is required for building HTML:

```sh
conda activate funasr
pip install requests sphinx nbsphinx sphinx_markdown_tables sphinx_rtd_theme recommonmark
pip3 install -U "funasr[docs]"
```

Then you can generate HTML manually.