Nginx logs manual link error

[leic4u]

https://github.com/0xJacky/nginx-ui/wiki/Nginx-Log-Configuration
The page pointed to by this link no longer exists.

The right link is the following url:
https://nginxui.com/zh_CN/guide/config-nginx-log.html

Please fix the error url in the Nginx Logs to the correct url, in the situation that users didn't fill the log path in Preference.

[leic4u]

@0xJacky The url mentioned in nginx logs(in beta19) not exists anymore. I didn't find the right url.

[0xJacky]

Fixed in 0863143