[Bug] vl_async_engine中存在一个拼写错误

[ghntd]

Checklist

• 1. I have searched related issues but cannot get the expected help.
• 2. The bug has not been fixed in the latest version.
• 3. Please note that if the bug-related issue you submitted lacks corresponding environment info and a minimal reproducible demo, it will be challenging for us to reproduce and resolve the issue, reducing the likelihood of receiving feedback.

Describe the bug

https://github.com/InternLM/lmdeploy/blob/main/lmdeploy/serve/vl_async_engine.py#L127
存在一个拼写错误，应该是system而不是sytem

Reproduction

None

Environment

None

Error traceback

No response

[lvhan028]

非常感谢指出问题，能否提交个 pr 顺手修下呢？