Update .gitlab-ci.yml

1 job for main in 4 seconds (queued for 7 seconds)
Name Stage Failure
run_pytest Test
Checking out 930abb83 as main...

Skipping Git submodules setup
Executing "step_script" stage of the job script
Using docker image sha256:4246fb19839fd033a0dd925c1f89cd1ad482c6b703d56f34bf0d2808b076e132 for python:latest with digest python@sha256:437585501d11ef4b4b831cf8a6d6611eb526e327006d506bcedcfdea3fde442a ...
$ pytest testlabRLS.py
/bin/bash: line 117: pytest: command not found
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1