Is your suggestion for improvement related to a problem? Please describe.
JabRef now offers arm64/aarch64 packages for Linux. We should also offer them as Snap

Describe the solution you'd like
Modify the snapcraft so support linux aarch64 as well

Additional context
Snapcraft:
https://github.com/JabRef/jabref/blob/main/snap/snapcraft.yaml

flatpak:
https://github.com/flathub/org.jabref.jabref/blob/master/org.jabref.jabref.yaml