build: Use maximum compression when archiving
build: Use maximum compression when archiving

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4229

rumpelsepp/syncthing,uok/syncthing,jryans/syncthing,imsodin/syncthing,AudriusButkevicius/syncthing,imsodin/syncthing,AudriusButkevicius/syncthing,jryans/syncthing,xduugu/syncthing,lkwg82/syncthing,uok/syncthing,rumpelsepp/syncthing,syncthing/syncthing,uok/syncthing,rumpelsepp/syncthing,lkwg82/syncthing,lkwg82/syncthing,lkwg82/syncthing,wweich/syncthing,AudriusButkevicius/syncthing,imsodin/syncthing,syncthing/syncthing,syncthing/syncthing,wweich/syncthing,AudriusButkevicius/syncthing,uok/syncthing,jryans/syncthing,rumpelsepp/syncthing,imsodin/syncthing,imsodin/syncthing,wweich/syncthing,xduugu/syncthing,xduugu/syncthing,syncthing/syncthing,jryans/syncthing,wweich/syncthing,syncthing/syncthing,xduugu/syncthing,syncthing/syncthing