I'm using Kubuntu 23.04, do not use Snaps, and wish to update to Thunderbird 115 from the installed version 102. Is this possible? It appears as if Ubuntu have stopped providing non-Snap packages for mainstream apps and Thunderbird themselves offer me a tar.bz2 whilst I'd rather use packaged apps. Will Thunderbird 115 be available as an official .deb file at all; will it be in the repos? What's the best non-Snap way to install it and keep it updated?