Fix wrong sassc package

1 job for master in 13 seconds (queued for 1 second)
Status Job ID Name Coverage
  Deploy
failed #26
pages

00:00:13

 
Name Stage Failure
failed
pages Deploy
rsync -a --delete src/style/font out/style
rsync -a --delete src/katze out
rsync -a --delete src/mann out
rsync -a --delete src/res out
rsync -a --delete src/pony out
sass -s expanded src/style/stylesheet.scss out/style/stylesheet.css
make: sass: Command not found
make: *** [makefile:33: out/style/stylesheet.css] Error 127
ERROR: Job failed: exit code 2