Update .gitlab-ci.yml

1 job for main in 4 minutes and 40 seconds (queued for 4 seconds)
Name Stage Failure
build_pytorch Build Pytorch
 ---> fa02d7867182
Step 5/9 : RUN "${CONDA_DIR}/envs/${conda_env}/bin/python" -m ipykernel install --user --name="${conda_env}" && fix-permissions "${CONDA_DIR}" && fix-permissions "/home/${NB_USER}"
---> Running in 431fdda300eb
Installed kernelspec python38 in /home/jovyan/.local/share/jupyter/kernels/python38
Removing intermediate container 431fdda300eb
---> 536d79dc90f1
Step 6/9 : COPY --chown=${NB_UID}:${NB_GID} requirements.txt "/home/${NB_USER}/tmp/"
unable to convert uid/gid chown string to host mapping: can't find uid for user ${NB_UID}: no such user: ${NB_UID}
Cleaning up file based variables
ERROR: Job failed: exit code 1