Update .gitlab-ci.yml

1 job for main in 5 seconds (queued for 3 seconds)
Name Stage Failure
failed
run_pytest Test
  File "/usr/local/lib/python3.10/runpy.py", line 196, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/usr/local/lib/python3.10/runpy.py", line 86, in _run_code
exec(code, run_globals)
File "/builds/VABorisov/labs_titp/testlabRLS.py", line 1, in <module>
import pytest
ModuleNotFoundError: No module named 'pytest'
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1