Logs are saved in XDG_CONFIG_HOME rather than XDG_STATE_HOME

### Expected behaviour
Logs should be saved ([as stated by freedesktop](https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html)) in the `XDG_STATE_HOME`.
A log is clearly not a "user-specific configuration" and logs are explicitly featured as an example of data that should be stored in `XDG_STATE_HOME`

### Actual behaviour
Logs are stored in the `XDG_CONFIG_HOME` instead in the `Nextcloud` folder instead.

### Steps to reproduce
Just use the client and let it produce logs.

### Client configuration
Client version: 3.2.2git

Operating system: Archlinux

OS language: German

Qt version used by client package (Linux only, see also Settings dialog): 5.15.2+kde+r196-1

Client package (From Nextcloud or distro) (Linux only): 3.2.2-1

Installation path of client: `/usr/share/nextcloud`