Move Flatpak Fedora runtime to F36 version
Fedora Flatpaks were updated for F36 and now require the F36 runtime
instead. This will fix the Rawhide builds of Silverblue.
https://github.com/fedora-silverblue/issue-tracker/issues/298
Signed-off-by: Tomas Popela <tpopela@redhat.com>