[ci] Increase default concurrency findtests.py

5 jobs for !2803 with feature/ci-increase-to-8-jobs
latest detached
Status Name Job ID Coverage
  Trigger
manual full-dune-2.7-clang
manual full-dune-2.7-gcc
manual full-dune-master-gcc
manual minimal-dune-2.7-gcc
 
  Downstream Modules
created trigger lecture