Small bugfix release:
- many: improve udev trigger on refresh experience
- systemd: require snapd.socket in snapd.seeded.service
- snap: don't include newline in hook environment
- interfaces/apparmor: allow killing snap-update-ns
- tests: skip "try" test on s390x
- tests: skip security-dev-input-event-denied when /dev/input/by-path/ is missing
- tests: skip security-dev-input-event-denied on s390x/arm64