Update .gitlab-ci.yml

1 job for master in 18 seconds (queued for 4 seconds)
Name Stage Failure
failed
Test SSH Test
$ eval $(ssh-agent -s)
Agent pid 381
$ echo "$SSH_PRIVATE_KEY" | base64 -d | tr -d '\r' | ssh-add - > /dev/null
Identity added: (stdin) (SimonNaundorf@Simons-N-MacBook-Pro.local)
$ mkdir -p ~/.ssh
$ chmod 700 ~/.ssh
$ ssh-keyscan bwunicluster.scc.kit.edu > ~/.ssh/known_hosts
Cleaning up file based variables
ERROR: Job failed: exit code 1