no gzip_user_css.h

Hi,

```
Arduino/libraries/EspWebUI-main/src/EspWebUI.h:12:10: fatal error: gzip_user_css.h: No such file or directory
 #include <gzip_user_css.h>

```

This include file is totally unknown. Even google give up ;)

So, no way to build  km271 v5.4.1  with auduino ide.

Franck