tweak README

4 jobs for ducc0 in 3 minutes (queued for 1 second)
Status Job ID Name Coverage
  Build Docker
passed #1099154
build_docker

00:00:21

 
  Testing
canceled #1099156
test_clang

00:02:39

canceled #1099155
test_gcc

00:02:39

 
  Build Tarballs
canceled #1099157
release