aboutdata: Rename QuasselDroid -> Quasseldroid
Update @justJanne 's contributor information to mention
"Quasseldroid" instead of "QuasselDroid". This matches upstream
rebranding to reduce the risk of a lawsuit from certain companies
involved with things called "Droid".
The other mention of "QuasselDroid" is from sandsmark, where the
project is still called "QuasselDroid" (and now marked as legacy).
It may be better to leave that one to distinguish the projects.
See https://git.kuschku.de/justJanne/QuasselDroid-ng/commit/
5e08f048764171d550ce17127c4075709bf9c2cd