docs: fix typo (#5330)

![image](https://github.com/eggjs/egg/assets/78291982/1578bfcd-a6ab-4c3d-b5e4-bea070fc4ee7)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit

- **Documentation**
- Updated the Chinese tutorial for Socket.IO to remove outdated
configuration comments.


<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Co-authored-by: fengmk2 <suqian.yf@antgroup.com>
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Fu Yuchen 2024-07-03 23:44:54 +08:00 committed by GitHub
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@ -116,7 +116,6 @@ location / {
# http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_bind
```
# proxy_bind $remote_addr transparent;
## 使用 `egg-socket.io`
开启 [egg-socket.io] 的项目目录结构如下: