update request for Desktop Launcher

[soultaco83]

Can this launcher be updated to utilize python version 3.10.12 like the docker image does,currently installs and uses version 3.7, as well as update to jellyfin-ffmpeg6?

[Josh5]

I've put together some fixes, but they need further testing before the changes hit the master branches.
You can test the new builds with the new ffmpeg and python 3.12, but you will need to select the "beta" channel for updates.