Update Gnome runtime to version 46

[CodeShakingSheep]

Hello, First of all thank you for this wonderful app, I really enjoy it! On my system it's the last app that runs on Gnome 45 runtime. All other apps are already running on Gnome 46 or 47 runtime. So, I would like to get rid of Gnome 45 runtime (it takes ~1.1 GB on my system) and for that I kindly ask the Gnome runtime to be updated to version 46. When I check my installed flatpaks with flatpak list --columns=runtime,name,ref this is the output for Hidamari:

org.gnome.Platform/x86_64/45                                  Hidamari                                                      io.github.jeffshee.Hidamari/x86_64/stable

The Gnome runtime would need to be updated in this repository, see https://github.com/jeffshee/hidamari/blob/master/io.github.jeffshee.Hidamari.json#L4 as well as in the flathub repository, see https://github.com/flathub/io.github.jeffshee.Hidamari/blob/master/io.github.jeffshee.Hidamari.json#L4. Thank you.