Update .gitlab-ci.yml

1 job for develop in 10 seconds (queued for 2 seconds)
Name Stage Failure
failed
build Build
Skipping Git submodules setup
Executing "step_script" stage of the job script
Using docker image sha256:6d1ef012b5674ad8a127ecfa9b5e6f5178d171b90ee462846974177fd9bdd39f for alpine:3.7 with digest alpine@sha256:8421d9a84432575381bfabd248f1eb56f3aa21d9d7cd2511583c68c9b7511d10 ...
$ echo "trigger lido-publication to automatically create html and pdf documentation"
trigger lido-publication to automatically create html and pdf documentation
$ curl -X POST -F token=ecc80d9da938856939bad8a8366765 -F ref=develop https://gitlab.gwdg.de/api/v4/projects/9849/trigger/pipeline
/bin/sh: eval: line 108: curl: not found
Cleaning up file based variables
ERROR: Job failed: exit code 127