Request: make AppImages updateable

[silentJET85]

It would be nice if update information could be added to the AppImage releases. Then it would be possible for people to update using tools like AppImageUpdate or AppImageLauncher, instead of needing to manually download each new release.

https://docs.appimage.org/packaging-guide/optional/updates.html

[clickot]

@silentJET85 thank you for your suggestion and the link to the according documentation, i'll take a look at it as soon as I get around to it